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• Wifi installation issues with a Sitecom 300N x2 Wireless Network dongle

  - by SlyrNemesis

  Linux newbie here, anyway so here is the problem, I run Ubuntu 10.10 and I have a Sitecom 300N x2 Wireless Network dongle with chipset 8192SU, I used ndiswrapper to install my Windows Wireless driver because Sitecom doesn't have a linux driver, it says hardware present but it doesn't find any Wireless networks, nor does it connect to one. What can I do? The command "dmesg | grep ndis" gave this output in the terminal: [ 9.999954] ndiswrapper version 1.56 loaded (smp=yes, preempt=no) [ 11.111901] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateNetBufferAndNetBufferList' [ 11.111973] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMIndicateReceiveNetBufferLists' [ 11.112099] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMRegisterMiniportDriver' [ 11.112161] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateMdl' [ 11.112220] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMDeregisterMiniportDriver' [ 11.112280] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisFreeNetBufferListPool' [ 11.112339] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateNetBufferListPool' [ 11.112399] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisFreeMdl' [ 11.112457] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMAllocatePort' [ 11.112515] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMNetPnPEvent' [ 11.112573] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMFreePort' [ 11.112631] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMSendNetBufferListsComplete' [ 11.112780] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMSetMiniportAttributes' [ 11.112848] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisOpenConfigurationEx' [ 11.112946] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMIndicateStatusEx' [ 11.113017] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisMOidRequestComplete' [ 11.113112] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateMemoryWithTagPriority' [ 11.113200] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisAllocateIoWorkItem' [ 11.113271] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisFreeIoWorkItem' [ 11.113342] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisQueueIoWorkItem' [ 11.113413] ndiswrapper (import:233): unknown symbol: NDIS.SYS:'NdisFreeNetBufferList' [ 11.113481] ndiswrapper (import:233): unknown symbol: WDFLDR.SYS:'WdfVersionBind' [ 11.113547] ndiswrapper (import:233): unknown symbol: WDFLDR.SYS:'WdfVersionBindClass' [ 11.113613] ndiswrapper (import:233): unknown symbol: WDFLDR.SYS:'WdfVersionUnbindClass' [ 11.113680] ndiswrapper (import:233): unknown symbol: WDFLDR.SYS:'WdfVersionUnbind' [ 11.113742] ndiswrapper (load_sys_files:206): couldn't prepare driver 'net8192su' [ 11.148888] ndiswrapper (load_wrap_driver:108): couldn't load driver net8192su; check system log for messages from 'loadndisdriver' [ 11.365200] usbcore: registered new interface driver ndiswrapper [ 12.818573] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.819183] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.819796] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.820505] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.821115] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.821726] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.822339] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.822948] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.823560] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy [ 12.824204] Modules linked in: snd_wavefront snd_emu10k1(+) snd_cs4236 snd_usb_audio snd_wss_lib snd_opl3_lib snd_ac97_codec ac97_bus nouveau(+) snd_pcm i915 snd_usbmidi_lib snd_util_mem snd_page_alloc snd_hwdep snd_mpu401 snd_mpu401_uart snd_seq_midi snd_rawmidi ttm snd_seq_midi_event drm_kms_helper snd_seq ppdev snd_timer snd_seq_device drm ndiswrapper snd parport_pc emu10k1_gp intel_agp ns558 gameport soundcore i2c_algo_bit shpchp lp video output agpgart parport usbhid hid 8139too 8139cp mii floppy

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• Dental SEO Bolsters the Popularity of Dental Care Insurance Coverage

  The benefits of dental insurance have been even more stressed upon by the well-known icons on television, who constantly seem to have flashing white flawless pearly whites. These types of teeth are caused by proper care, expensive dental consideration and therefore the need for costly group dental insurance plans offered by insurance providers that decrease in number by the day.

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• JavaOne - Java SE Embedded Booth - Digi - Home Health Hub (HHH)

  - by David Clack

  Hi All,  So another exciting platform we will have in the booth at JavaOne is the Digi  Home Health Hub (HHH) platform. http://www.digi.com/products/wireless-wired-embedded-solutions/single-board-computers/idigi-telehealth-application-kit#overview This is a Freescale reference design that has been built by Digi, the system is powered by a Freescale i.MX28 ARM SOC, what's really exciting me is it has every wireless protocol you could ever want on a single motherboard. Ethernet, 802.11b/g/n Wi-Fi, Bluetooth, ZigBee, configurable Sub-GHz radio, NFC plus USB, audio and LCD/touch screen option. I've been experimenting with lots of wireless capable healthcare products in the last few months, plus some Bluetooth Pulse / Oxy meters, we have been looking at how the actual healthcare wireless protocols work. Steve Popovich - Vice President, Digi Internationalwill be doing a talk at the Java Embedded @ JavaOne conference in the Hotel Nikko, right next door to the JavaOne show in the Hilton. If you are registered at JavaOne you can come over to the Java Embedded @ JavaOne for $100 Come see us in booth 5605 See you there Dave

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• Inconsistencies in Health Monitoring Between WebForms and MVC

  As I have written and spoken on numerous occasions, Health Monitoring happens to be one of my favorite features in ASP.NET. In WebForms, it's a path well trodden. However, while building Morts & Elvises with MVC2, I ran into a strange inconsistency, which I'd like to describe here. WebForms Whenever a WebForm throws an unhandled exception, at the very least the error is written to the system's even log. Suppose we have this silly simple page method: protected override void OnLoad...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• FastGate A20 Line And Himem.sys Issue With Updating BIOS

  - by Boris_yo

  I have been persistent with a thought to perform my first BIOS update ever through MS-DOS but have been postponing this task until today. Despite people telling me any bootable ISO will do it either through CD-ROM or RAMDRIVE, I am still having problems. First is the problem with CD-ROM driver trying to make it work with 4 driver files (cd1.SYS, cd2.SYS, cd3.SYS, cd4.SYS) as well as starting RAMDISK proved to be failure: CD-ROM XMS Allocation Error RAMDISK XMS Allocaton Error (X: and R: drives not working) This A20 line seemed to be the obstacle which then after a couple of searches pointed me to this article on Microsoft website. It seems that FastGate is the culprit which takes over A20 line and conflicts with himem.sys which should be handling it causing the driver to be unable to allocate memory resources. Albeit article suggests 2 workarounds which is disabling FastGate option or adding switch, I read that the former workaround could cause problems which involves later tinkering BIOS, disabling shadow copy etc. while the latter workaround can just hang system as stated in the link above. I assume it just hangs the boot process from image file though. Summing up the above, I am cautious and think it is risky to follow both workarounds because disabling FastGate or trying adding switch by trying available switches from 1-14 or 16, could crash the BIOS update process by itself. I could do this without the need for himem.sys with bootable USB thumbdrive by making it to be seen as USB-HDD, but some time ago I read that it is never a good idea to update BIOS from hard drive so even thought it is simulation, who knows... Maybe it will deactivate hard drive in the middle of the BIOS update process or even USB thumbdrive per se? One forum discussion was about updating BIOS and somebody suggested to not load himem.sys for some reason, but now that I think of it, what if BIOS update needs upper memory?

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• SQL SERVER – DMV – sys.dm_exec_query_optimizer_info – Statistics of Optimizer

  - by pinaldave

  Incredibly, SQL Server has so much information to share with us. Every single day, I am amazed with this SQL Server technology. Sometimes I find several interesting information by just querying few of the DMV. And when I present this info in front of my client during performance tuning consultancy, they are surprised with my findings. Today, I am going to share one of the hidden gems of DMV with you, the one which I frequently use to understand what’s going on under the hood of SQL Server. SQL Server keeps the record of most of the operations of the Query Optimizer. We can learn many interesting details about the optimizer which can be utilized to improve the performance of server. SELECT * FROM sys.dm_exec_query_optimizer_info WHERE counter IN ('optimizations', 'elapsed time','final cost', 'insert stmt','delete stmt','update stmt', 'merge stmt','contains subquery','tables', 'hints','order hint','join hint', 'view reference','remote query','maximum DOP', 'maximum recursion level','indexed views loaded', 'indexed views matched','indexed views used', 'indexed views updated','dynamic cursor request', 'fast forward cursor request') All occurrence values are cumulative and are set to 0 at system restart. All values for value fields are set to NULL at system restart. I have removed a few of the internal counters from the script above, and kept only documented details. Let us check the result of the above query. As you can see, there is so much vital information that is revealed in above query. I can easily say so many things about how many times Optimizer was triggered and what the average time taken by it to optimize my queries was. Additionally, I can also determine how many times update, insert or delete statements were optimized. I was able to quickly figure out that my client was overusing the Query Hints using this dynamic management view. If you have been reading my blog, I am sure you are aware of my series related to SQL Server Views SQL SERVER – The Limitations of the Views – Eleven and more…. With this, I can take a quick look and figure out how many times Views were used in various solutions within the query. Moreover, you can easily know what fraction of the optimizations has been involved in tuning server. For example, the following query would tell me, in total optimizations, what the fraction of time View was “reference“. As this View also includes system Views and DMVs, the number is a bit higher on my machine. SELECT (SELECT CAST (occurrence AS FLOAT) FROM sys.dm_exec_query_optimizer_info WHERE counter = 'view reference') / (SELECT CAST (occurrence AS FLOAT) FROM sys.dm_exec_query_optimizer_info WHERE counter = 'optimizations') AS ViewReferencedFraction Reference : Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL DMV, SQL Optimization, SQL Performance, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, SQLServer, T SQL, Technology

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• July, the 31 Days of SQL Server DMO’s – Day 21 (sys.dm_db_partition_stats)

  - by Tamarick Hill

  The sys.dm_db_partition_stats DMV returns page count and row count information for each table or index within your database. Lets have a quick look at this DMV so we can review some of the results. **NOTE: I am going to create an ‘ObjectName’ column in our result set so that we can more easily identify tables. SELECT object_name(object_id) ObjectName, * FROM sys.dm_db_partition_stats As stated above, the first column in our result set is an Object name based on the object_id column of this result set. The partition_id column refers to the partition_id of the index in question. Each index will have at least 1 unique partition_id and will have more depending on if the object has been partitioned. The index_id column relates back to the sys.indexes table and uniquely identifies an index on a given object. A value of 0 (zero) in this column would indicate the object is a HEAP and a value of 1 (one) would signify the Clustered Index. Next is the partition_number which would signify the number of the partition for a particular object_id. Since none of my tables in my result set have been partitioned, they all display 1 for the partition_number. Next we have the in_row_data_page_count which tells us the number of data pages used to store in-row data for a given index. The in_row_used_page_count is the number of pages used to store and manage the in-row data. If we look at the first row in the result set, we will see we have 700 for this column and 680 for the previous. This means that just to manage the data (not store it) is requiring 20 pages. The next column in_row_reserved_page_count is how many pages have been reserved, regardless if they are being used or not. The next 2 columns are used for storing LOB (Large Object) data which could be text, image, varchar(max), or varbinary(max) columns. The next two columns, row_overflow, represent pages used for data that exceed the 8,060 byte row size limit for the in-row data pages. The next columns used_page_count and reserved_page_count represent the sum of the in_row, lob, and row_overflow columns discussed earlier. Lastly is a row_count column which displays the number of rows that are in a particular index. This DMV is a very powerful resource for identifying page and row count information. By knowing the page counts for indexes within your database, you are able to easily calculate the size of indexes. For more information on this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms187737.aspx Follow me on Twitter @PrimeTimeDBA

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• July, the 31 Days of SQL Server DMO’s – Day 24 (sys.dm_db_index_operational_stats)

  - by Tamarick Hill

  The sys.dm_db_index_operational_stats Dynamic Management Function returns information about the IO, locking, and access methods for the indexes that you currently have on your SQL Server Instance. This function takes four input parameters which are (1) database_id, (2) object_id, (3) index_id, and (4) partition_number. Let’s have a look at the results from this function against our AdventureWorks2012 database. This function returns a ton of columns, so not only will I not attempt to describe each of the columns, I wont even attempt to display all of them here. My query below will give you a subset of the columns returned from this function. SELECT database_id, object_id, index_id, partition_number, leaf_insert_count, leaf_delete_count, leaf_update_count, leaf_ghost_count, nonleaf_insert_count, nonleaf_delete_count, nonleaf_update_count, range_scan_count, forwarded_fetch_count, row_lock_count, row_lock_wait_count, page_lock_count, page_lock_wait_count, Index_lock_promotion_attempt_count, index_lock_promotion_count, page_compression_attempt_count, page_compression_success_count FROM sys.dm_db_index_operational_stats(db_id('AdventureWorks2012'), NULL, NULL, NULL) The first four columns in the result set represent the values that we passed in as our input parameters. If you use NULL’s as I did, then you will see results for every index on your system. I specified a database_id so my result set only shows those records pertaining to my AdventureWorks2012 database. The next columns in the result set provide you with information on how may inserts, deletes, or updates that have taken place on your leaf and nonleaf index levels. The nonleaf levels would refer to the intermediate and root index levels. In the middle of these you see a leaf_ghost_count column, which represents the number of records that have been logically deleted and marked as “ghosted”  and are waiting on the background ghost cleanup process to physically remove them. The range_scan_count column represents the number of range or table scans that have been performed against an index. The forwarded_fetch_count column represents the number of rows that were returned from a forwarding row pointer. The row_lock_count and row_lock_wait_count represent the number of row locks that have been requested for an index and the number of times SQL has had to wait on a row lock respectively. The page_lock_count and page_lock_wait_count represent the number of page locks that have been requested for an index and the number of times SQL has had to wait on a page lock respectively. The index_lock_promotion_attempt_count represents the number of times the database engine has attempted to promote a lock to the index level. The index_lock_promotion_count column displays how many times that index lock promotion was successful. Lastly the page_compression_attempt_count and page_compression_success_count represents how many times a page was attempted to be compressed and how many times the attempt was successful. As you can see there is a ton of information returned from this DMV. The DMV we reviewed on yesterday (sys.dm_db_index_usage_stats) provided you with good information on when and how indexes have been used, but this DMF takes an even deeper dive into these statistics. If you are interested in performing a very detailed analysis on the operational stats of your indexes, this is not only a good place to start, but more than likely the best place. For more information on this Dynamic Management Function, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms174281.aspx Follow me on Twitter @PrimeTimeDBA

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• July, the 31 Days of SQL Server DMO’s – Day 30 (sys.dm_server_registry)

  - by Tamarick Hill

  The sys.dm_server_registry DMV is used to provide SQL Server configuration and installation information that is currently stored in your Windows Registry. It is a very simple DMV that returns only three columns. The first column returned is the registry_key. The second column returned is the value_name which is the name of the actual registry key value. The third and final column returned is the value_data which is the value of the registry key data. Lets have a look at the information this DMV returns as well as some key values from the Windows Registy. SELECT * FROM sys.dm_server_registry View using RegEdit to view the registy: This DMV provides you with a quick and easy way to view SQL Server Instance registry values. For more information about this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/hh204561.aspx Follow me on Twitter @PrimeTimeDBA

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• July, the 31 Days of SQL Server DMO’s – Day 26 (sys.dm_db_log_space_usage)

  - by Tamarick Hill

  The sys.dm_db_log_space_usage DMV is a new DMV for SQL Server 2012. It returns Total Size, Used Size, and Used Percent size for a transaction log file of a given database. To illustrate this DMV, I will query the DMV against my AdventureWorks2012 database. SELECT * FROM sys.dm_db_log_space_usage As mentioned above, the result set gives us the total size of the transaction log in bytes, the used size of the log in bytes, and the percent of the log that has been used. This is a very simplistic DMV but returns valuable information. Being able to detect when a transaction log is close to being full is always a valuable thing to alert on, and this DMV just provided an additional method for acquiring the necessary information. Follow me on Twitter @PrimeTimeDBA

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• emacs for sys admins

  - by mbac32768

  Are you a sys admin that uses emacs? What tools/plugins do you find essential? In my organization the programmers tend to use emacs whereas the sys admins gravitate towards vim. Since we have 4:1 programmers:sys admins, the global emacs config has a lot more goodness but it doesn't fit nicely into my workflow since I'm used to starting/stopping vim on remote hosts 1000 times a day Does emacs have a place in your sys admin workflow?

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• How to restore a hidden loadable kernel module from /sys/module and dealing with restoring holders_dir?

  - by user1833005

  I'm playing with kernel module hiding on Linux Kernel 3.x. I try to hide and recover the module from /sys/module. Everything works fine on Kernel Version 3.0 and 3.2.6, I can load and unload the module and hide and unhide it. When I'm unloading the module on kernel 3.6.6 I get the following error: rmmod: ERROR: could not open '/sys/module/xxx/holders': No such file or directory rmmod: ERROR: Module xxx is in use Has anybody an idea how I could restore of the module so that I am able to unload it without errors? Here is my code: /* hide from /sys/module */ kobject_del(&__this_module.mkobj.kobj); list_del(&__this_module.mkobj.kobj.entry); /* add to /sys/module */ kobject_add(&__this_module.mkobj.kobj,__this_module.mkobj.kobj.parent,"xxx"); Thank you four help :)

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• Is it possible to programmatically control c# health monitoring without using the web.config file?

  - by Adam

  I have developed my own custom provider for the health monitoring; however, I use parameters in the constructor and this is not allowed when using the health monitoring from the web.config file. Does anyone know if I can turn on/off the monitoring and have it watch properly through code (possibly in my global.asax file on application startup). Or, is it possible for me to create my own watcher that will do the same thing as the health monitor. Or, finally - can I just pass variables from the web.config setup (i'm not familiar with the public token part of the provider type declaration). Thanks in advance

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• July, the 31 Days of SQL Server DMO’s – Day 22 (sys.dm_db_index_physical_stats)

  - by Tamarick Hill

  The sys.dm_db_index_physical_stats Dynamic Management Function is used to return information about the fragmentation levels, page counts, depth, number of levels, record counts, etc. about the indexes on your database instance. One row is returned for each level in a given index, which we will discuss more later. The function takes a total of 5 input parameters which are (1) database_id, (2) object_id, (3) index_id, (4) partition_number, and (5) the mode of the scan level that you would like to run. Let’s use this function with our AdventureWorks2012 database to better illustrate the information it provides. SELECT * FROM sys.dm_db_index_physical_stats(db_id('AdventureWorks2012'), NULL, NULL, NULL, NULL) As you can see from the result set, there is a lot of beneficial information returned from this DMF. The first couple of columns in the result set (database_id, object_id, index_id, partition_number, index_type_desc, alloc_unit_type_desc) are either self-explanatory or have been explained in our previous blog sessions so I will not go into detail about these at this time. The next column in the result set is the index_depth which represents how deep the index goes. For example, If we have a large index that contains 1 root page, 3 intermediate levels, and 1 leaf level, our index depth would be 5. The next column is the index_level which refers to what level (of the depth) a particular row is referring to. Next is probably one of the most beneficial columns in this result set, which is the avg_fragmentation_in_percent. This column shows you how fragmented a particular level of an index may be. Many people use this column within their index maintenance jobs to dynamically determine whether they should do REORG’s or full REBUILD’s of a given index. The fragment count represents the number of fragments in a leaf level while the avg_fragment_size_in_pages represents the number of pages in a fragment. The page_count column tells you how many pages are in a particular index level. From my result set above, you see the the remaining columns all have NULL values. This is because I did not specify a ‘mode’ in my query and as a result it used the ‘LIMITED’ mode by default. The LIMITED mode is meant to be lightweight so it does collect information for every column in the result set. I will re-run my query again using the ‘DETAILED’ mode and you will see we now have results for these rows. SELECT * FROM sys.dm_db_index_physical_stats(db_id('AdventureWorks2012'), NULL, NULL, NULL, ‘DETAILED’)   From the remaining columns, you see we get even more detailed information such as how many records are in a particular index level (record_count). We have a column for ghost_record_count which represents the number of records that have been marked for deletion, but have not physically been removed by the background ghost cleanup process. We later see information on the MIN, MAX, and AVG record size in bytes. The forwarded_record_count column refers to records that have been updated and now no longer fit within the row on the page anymore and thus have to be moved. A forwarded record is left in the original location with a pointer to the new location. The last column in the result set is the compressed_page_count column which tells you how many pages in your index have been compressed. This is a very powerful DMF that returns good information about the current indexes in your system. However, based on the mode you select, it could be a very resource intensive function so be careful with how you use it. For more information on this Dynamic Management Function, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms188917.aspx Follow me on Twitter @PrimeTimeDBA

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• Take care to unhook Anonymous Delegates

  - by David Vallens

  Anonymous delegates are great, they elimiante the need for lots of small classes that just pass values around, however care needs to be taken when using them, as they are not automatically unhooked when the function you created them in returns. In fact after it returns there is no way to unhook them. Consider the following code.   using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { SimpleEventSource t = new SimpleEventSource(); t.FireEvent(); FunctionWithAnonymousDelegate(t); t.FireEvent(); } private static void FunctionWithAnonymousDelegate(SimpleEventSource t) { t.MyEvent += delegate(object sender, EventArgs args) { Debug.WriteLine("Anonymous delegate called"); }; t.FireEvent(); } } public class SimpleEventSource { public event EventHandler MyEvent; public void FireEvent() { if (MyEvent == null) { Debug.WriteLine("Attempting to fire event - but no ones listening"); } else { Debug.WriteLine("Firing event"); MyEvent(this, EventArgs.Empty); } } } } If you expected the anonymous delegates do die with the function that created it then you would expect the output Attempting to fire event - but no ones listeningFiring eventAnonymous delegate calledAttempting to fire event - but no ones listening However what you actually get is Attempting to fire event - but no ones listeningFiring eventAnonymous delegate calledFiring eventAnonymous delegate called In my example the issue is just slowing things down, but if your delegate modifies objects, then you could end up with dificult to diagnose bugs. A solution to this problem is to unhook the delegate within the function var myDelegate = delegate(){Console.WriteLine("I did it!");}; MyEvent += myDelegate; // .... later MyEvent -= myDelegate;

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• July, the 31 Days of SQL Server DMO’s – Day 20 (sys.dm_tran_locks)

  - by Tamarick Hill

  The sys.dm_tran_locks DMV is used to return active lock resources on your server. Locking is a mechanism used by SQL Server to protect the integrity of data when you have multiple users that may potentially access the same data at the same time. Let’s run a query against this DMV so we can analyze the results. SELECT * FROM sys.dm_tran_locks As we can see, its a lot of lock information returned from this DMV. I will not go into detail about each of the columns returned, but I will touch on the ones that I feel are the most important. The first column in the output is the resource_type column which tells you the type of lock a particular row represents. It could be a PAGE lock, RID, OBJECT, DATABASE, or several other lock types. The resource_database_id represents the id of the database for a particular lock resource. The resource_lock_partition column represents the ID of a lock partition. When you have a table that is partitioned, locks can be escalated to the partition level before going to a table level lock. The request_mode column gives us information about the type of lock that is being requested. From the screenshots above we see RangeS-S locks which represent a share range lock and IS locks which represent Intent Shared locks. The request_status column displays whether the lock has been granted or whether the lock is waiting to be acquired. The request_session_id  shows the session_id that is requesting the lock. This DMV is the best place to go when you need to identify the exact locks that are being held or pending for individual requests. You might need this information when you are troubleshooting severe blocking or deadlocking problems on your server. For more information on this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms190345.aspx Follow me on Twitter @PrimeTimeDBA

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• July, the 31 Days of SQL Server DMO’s – Day 18 (sys.dm_io_virtual_file_stats)

  - by Tamarick Hill

  The sys.dm_io_virtual_file_stats Dynamic Management Function is used to return IO statistic information about each of your database files on your server. As input parameters, this function takes a database_id and a file_id. If you want to return IO statistic information for all files, you can simply pass in NULL values for both of these. Let’s have a look at this function  and examine its results: SELECT db_name(database_id) DatabaseName, * FROM sys.dm_io_virtual_file_stats(NULL, NULL) The first column in the result set is the DatabaseName which is just a column I created using the db_name() system function and the database_id column from this function. Next we have a file_id which represent the ID for the file, whether it be a data file or transaction log file. The ‘sample_ms’ column represents the total time in milliseconds that the instance has been up and running. Next we have the ‘num_of_reads’, ‘num_of_bytes_read’, and later ‘num_of_writes’, and ‘num_of_bytes_written’. These columns represent the number of reads or writes and number of bytes read or written against a particular file. These columns are beneficial when determining how often a particular file is being accessed. The ‘io_stall_read_ms’ and io_stall_write_ms’ columns each represent the the total time in milliseconds that users have had to wait for reads or writes against a file respectively. The ‘io_stall’ column is the sum of both read and write io stalls. The ‘size_on_disk_bytes’ column represents the size of the respective file on your disk subsystem. Lastly the ‘file_handle’ column is simply the Windows File handle. This Dynamic Management Function is useful when you are needing to analyze your database files for the purposes of segregating high IO databases. This DMF gives you a good view of which of your database files are being accessed the most and which ones may be generating the largest IO stalls. These could be your best candidates for moving into separate IO channels. For more information about this DMF, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms190326.aspx Follow me on Twitter @PrimeTimeDBA

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• July, the 31 Days of SQL Server DMO’s – Day 27 (sys.dm_db_file_space_usage)

  - by Tamarick Hill

  The sys.dm_db_file_space usage DMV returns information about database file space usage.  This DMV was enhanced for the 2012 version to include 3 additional columns. Let’s query this DMV against our AdventureWorks2012 database and view the results. SELECT * FROM sys.dm_db_file_space_usage The column returned from this DMV are really self-explanatory, but I will give you a description, paraphrased from books online, below. The first three columns returned from this DMV represent the Database, File, and Filegroup for the current database context that executed the DMV query. The next column is the total_page_count which represents the total number of pages in the file. The allocated_extent_page_count represents the total number of pages in all extents that have been allocated. The unallocated_extent_page_count represents the number of pages in the unallocated extents within the file. The version_store_reserved_page_count column represents the number of pages that are allocated to the version store. The user_object_reserved_page_count represents the number of pages allocated for user objects. The internal_object_reserved_page_count represents the number of pages allocated for internal objects.  Lastly is the mixed_extent_page_count which represents the total number of pages that are part of mixed extents. This is a great DMV for retrieving usage space information from your database files. For more information about this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms174412.aspx Follow me on Twitter @PrimeTimeDBA

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• July, the 31 Days of SQL Server DMO’s – Day 31 (sys.dm_server_services)

  - by Tamarick Hill

  The last DMV for this month long blog session is the sys.dm_server_services DMV. This DMV returns information about your SQL Server, Full-Text, and SQL Server Agent related services. To further illustrate the information this DMV contains, lets run it against our Training instance that we have been using for this blog series. SELECT * FROM sys.dm_server_services The first column returned by this DMV is the actual Service Name. The next columns are the startup_type and startup_type_desc columns which display your chosen method for how a particular method should be started. The next columns status and status_desc display the current status for each of your Services on the instance. The process_id column represents the server process id. The last_startup_time column gives you the last time that a particular service was started. The service_account column provides you with the name of the account that is used to control the service. The filename column gives you the full path to the executable for the service. Lastly we have the is_clustered column and the cluster_nodename which indicates whether or not a particular service is clustered and is part of a resource cluster group, and if so, the cluster node that the service is installed on. This is a good DMV to provide you with a quick snapshot view of the current SQL Server services you have on your instance. For more information on this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/hh204542.aspx Follow me on Twitter @PrimeTimeDBA

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• July, the 31 Days of SQL Server DMO’s – Day 3 (sys.dm_exec_connections)

  - by Tamarick Hill

    The third DMV we will review is the sys.dm_exec_connections DMV. This DMV is Server-Scoped and displays information about each and every current connection on your SQL Server Instance. Lets take a look at some information that this DMV returns. SELECT * FROM sys.dm_exec_connections After reviewing this DMV, in my opinion, its not a whole lot of useful information returned from this DMV from a monitoring or troubleshooting standpoint. The primary use case I have for this DMV is when I need to get a quick count of how many connections I have on one of my SQL Server boxes. For this purpose a quick SELECT COUNT(*) satisfies my need. However, for those who need it, there is other information such as what type of authentication a specific connection is using, network packet size, and client/local TCP ports being used. This information can come in handy for specific scenarios but you probably wont need it very much for your day to day monitoring/troubleshooting needs. However, this is still an important DMV that you should be aware of in the event that you need it. For more information on this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms181509.aspx

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• Oracle Tutor: XPDL conversion (and why you should care)

  - by mary.keane

  You may have noticed that the Oracle Business Process Converter feature in Tutor 14 supports "XPDL" conversion to Oracle Business Process Analysis Suite (BPA), Oracle Business Process Management Suite (BPM), and Oracle Tutor, and you may have briefly wondered "what is XPDL?" before you moved on to the Visio import feature (a very popular feature in Tutor 14). This posting is for those who do not yet understand (or care) about XPDL and process modeling. Many of us (and I'm including myself) have spent years working in the process definition arena: we've written procedures, designed systems and software to help others write procedures, and have been responsible for embedding policies and procedures into training material for employees. We've worked with tools such as Oracle Tutor, Microsoft Visio, Microsoft Word, and UPK. Most of us have never worked with "modeling tools" before, and we certainly never had to understand BPMN. It's a brave new world in this arena, and companies desperately need people with policy and procedural system expertise to be able to work with system analysts so there is a seamless transfer of knowledge from IT to employees. When working with applications, a picture is worth a thousand words, so eventually you're going to need to understand and be able to work with business process models. XPDL is an acronym for XML Process Definition Language, and it is an interchange format for business process models. It allows you to take a BPMN model that was developed in one workflow application such as BizAgi and import it into another workflow application or a true BPMN management system such as Oracle BPM. Specifically, the XPDL format contains the graphical information of a model as well as any executable information. By using a common format, models can be moved from a basic modeling application used by business owners to applications used by system architects. Over 80 applications support the XPDL format, including MetaStorm ProVision, BEA ALBPM, BizAgi, and Tibco. I mention these applications because we have provided XSLT mapping files specifically for these vendors. Oracle Business Process Converter was designed with user extensibility in mind, and thus users can add their own XML files so that additional XPDL models from other vendors can be converted to BPM, BPA, and Oracle Tutor. Instructions on how to add your own files can be found in Appendix 4 of the Oracle Business Converter manual. Let's take a visual look at how this works. Here is an example of a model devloped in BizAgi: This model can be created by the average business user without a large learning curve, and it's a good start for the system analyst who will be adding web services as well as for the business manager who manages the process described in the model. By exporting this model as XPDL, the information can be converted into Oracle BPA and Oracle BPM as well as converted to Oracle Tutor to become the framework for a procedure. Through this conversion feature, one graphic illustration of a business process can be used by a system analyst, business analyst, business manager, and employee, as seen below. Model Converted to Tutor Procedure Below is the task section of the procedure after conversion from an XPDL file. Model converted to BPA Model converted to BPM End users still want step by step instructions on how to perform their jobs, so procedures (Oracle Tutor) and application simulations (UPK) are still a critical piece of the solution. But IT professionals need graphic descriptions of how the applications work, regardless of whether there are any tasks involving humans. Now there is a way to convert procedures (Oracle Tutor docx files) and basic models (XPDL files) so that business managers and system analysts can share process information. References Wikipedia XPDL. Workflow Management Coalition, XPDL Support and Resources Oracle Business Process Converter manual, Oracle Tutor 14 Oracle Business Process Management 11g If you have any XPDL conversion stories to share, we'd love to hear from you. Best wishes for the coming new year, Mary Keane, Senior Development Manager, Oracle Tutor and BPM

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• What's one change in your lifestyle that positively affected your work and health?

  - by pbrodka

  We know that working many hours in front of computers gives us many bad and unhealthy habits, bad health conditions and so on, which in the long term decrease our productivity. Did you make any big changes in your lifestyle that made a big improvement in your health and productivity? Please name one such activity - it could be change of diet, more sports, less coffee, change in your work environment.

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• Reconfiguring, then deleting obsolete pagefile.sys from C: in one go using a batch script

  - by DanielSmedegaardBuus

  I'm trying to set up an automated script for a Windows XP installer. It's a batch script that runs on first boot after installation, and among the things I'm trying to accomplish, is removing the pagefile from C: entirely, and putting a 16-768 MB pagefile on D: instead. Here're my batch file instructions: echo === Creating new page file on D: ... cscript %windir%\system32\pagefileconfig.vbs /create /i 16 /m 768 /vo d: >nul echo. echo === Removing old page file from C: ... cscript %windir%\system32\pagefileconfig.vbs /delete /vo C: attrib -s -h c:\pagefile.sys del c:\pagefile.sys My problem is that while these are sane commands, the removal of the pagefile on C: requires me to reboot before those commands succeed.b Or, in other words — I have to first create the D: pagefile, then reboot and delete the c:\pagefile.sys file, or I'm stuck with a c:\pagefile.sys file which isn't even recognized by Windows itself (it'll just say that there's a page file on D:, and that C: has no pagefile at all). Obviously because already some pages are written to the C:\pagefile.sys file. So how would I go about accomplishing this in one go? Or, in two gos, if this is "batch scriptable" :) TIA, Daniel :) EDIT: I should probably clarify: Running those commands above are all valid, but they'll only succeed fully if I re-run the "attrib" and "del" commands at next boot. The C: pagefile is in use at the time, so I cannot delete the file it uses, and Windows itself won't remove it when I configure it to not use C: as a page file drive. Instead, it'll leave an orphaned c:\pagefile.sys file behind (which is really large). I don't necessarily need this to work in one go, registering the last two commands to run after a reboot would also be great :)

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• July, the 31 Days of SQL Server DMO’s – Day 29 (sys.dm_os_buffer_descriptors)

  - by Tamarick Hill

  The sys.dm_os_buffer_descriptors Dynamic Management View gives you a look into the data pages that are currently in your SQL Server buffer pool. Just in case you are not familiar with some of the internals to SQL Server and how the engine works, SQL Server only works with objects that are in memory (buffer pool). When an object such as a table needs to be read and it does not exist in the buffer pool, SQL Server will read (copy) the necessary data page(s) from disk into the buffer pool and cache it. Caching takes place so that it can be reused again and prevents the need of expensive physical reads. To better illustrate this DMV, lets query it against our AdventureWorks2012 database and view the result set. SELECT * FROM sys.dm_os_buffer_descriptors WHERE database_id = db_id('AdventureWorks2012') The first column returned from this result set is the database_id column which identifies the specific database for a given row. The file_id column represents the file that a particular buffer descriptor belongs to. The page_id column represents the ID for the data page within the buffer. The page_level column represents the index level of the data page. Next we have the allocation_unit_id column which identifies a unique allocation unit. An allocation unit is basically a set of data pages. The page_type column tells us exactly what type of page is in the buffer pool. From my screen shot above you see I have 3 distinct type of Pages in my buffer pool, Index, Data, and IAM pages. Index pages are pages that are used to build the Root and Intermediate levels of a B-Tree. A Data page would represent the actual leaf pages of a clustered index which contain the actual data for the table. Without getting into too much detail, an IAM page is Index Allocation Map page which track GAM (Global Allocation Map) pages which in turn track extents on your system. The row_count column details how many data rows are present on a given page. The free_space_in_bytes tells you how much of a given data page is still available, remember pages are 8K in size. The is_modified signifies whether or not a page has been changed since it has been read into memory, .ie a dirty page. The numa_node column represents the Nonuniform memory access node for the buffer. Lastly is the read_microsec column which tells you how many microseconds it took for a data page to be read (copied) into the buffer pool. This is a great DMV for use when you are tracking down a memory issue or if you just want to have a look at what type of pages are currently in your buffer pool. For more information about this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms173442.aspx Follow me on Twitter @PrimeTimeDBA

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• July, the 31 Days of SQL Server DMO’s – Day 25 (sys.dm_db_missing_index_details)

  - by Tamarick Hill

  The sys.dm_db_missing_index_details Dynamic Management View is used to return information about missing indexes on your SQL Server instances. These indexes are ones that the optimizer has identified as indexes it would like to use but did not have. You may also see these same indexes indicated in other tools such as query execution plans or the Database tuning advisor. Let’s execute this DMV so we can review the information it provides us. I do not have any missing index information for my AdventureWorks2012 database, but for the purposes of illustrating the result set of this DMV, I will present the results from my msdb database. SELECT * FROM sys.dm_db_missing_index_details The first column presented is the index_handle which uniquely identifies a particular missing index. The next two columns represent the database_id and the object_id for the particular table in question. Next is the ‘equality_columns’ column which gives you a list of columns (comma separated) that would be beneficial to the optimizer for equality operations. By equality operation I mean for any queries that would use a filter or join condition such as WHERE A = B. The next column, ‘inequality_columns’, gives you a comma separated list of columns that would be beneficial to the optimizer for inequality operations. An inequality operation is anything other than A = B. For example, “WHERE A != B”, “WHERE A > B”, “WHERE A < B”, and “WHERE A <> B” would all qualify as inequality. Next is the ‘included_columns’ column which list all columns that would be beneficial to the optimizer for purposes of providing a covering index and preventing key/bookmark lookups. Lastly is the ‘statement’ column which lists the name of the table where the index is missing. This DMV can help you identify potential indexes that could be added to improve the performance of your system. However, I will advise you not to just take the output of this DMV and create an index for everything you see. Everything listed here should be analyzed and then tested on a Development or Test system before implementing into a Production environment. For more information on this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms345434.aspx Follow me on Twitter @PrimeTimeDBA

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