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• eSata plugged into Sata socket via adaptor cable very slow

  - by Jon

  Why would an external eSata Drive (xSonic with 500Gb notebook Hard Drive) run ok on a Silicon Image based PCI-E to eSata adaptor at about 35MB/s, But then run really slow when plugged into NForce4 Sata socket via cable? I have another version of the problem with Really slow 1MB/s!!! performance on a ASUS P5K Pro Motherboard with E8400 CPU. This time the same card is plugged into a PCI-E socket. The same eSata drive is plugged into the Esata port on the card. All this is running on Windows XP Pro 32bit. Any suggestions on how to diagnose the problems??

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• Why would the 'show processlist' command speed up normally slow requests to my remote DB? (connected via VPN)

  - by Hakan B.

  I am running a local Django development server that connects to a remote MySQL server via a VPN (IPSec). Request times are awfully slow and I consistently see timeouts. Attempting to diagnose the problem, I logged in to the remote database and ran: show full processlist Immediately, the local server went from idle to working. The page had not yet completely loaded, but progress had been made (debug logs confirm this). When I ran 'show full processlist' several times more in succession, the request completed quickly. I can currently reproduce this - unless I run 'show full processlist' over and over on the remote server, my local request usually times out. Does anyone have any idea why this would happen? I'm running Django 1.3 and OS X 10.7. Note: I realize this may be entirely not be a question with a clear-cut answer and is probably my fault, but it is odd and reproducable, so I hope someone can at least point me the right direction. Thanks in advance.

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• cURL works but PHP cURL fails to internet [migrated]

  - by wrk2bike

  Trying to diagnose an issue using PHP to cURL to an Internet location on a RedHat Linux server. cURL is installed and working, and: <?php var_dump(curl_version()); ?> shows all the correct information in the output. The issue is I can use PHP to cURL to localhost on the box itself, but not the Internet (see below). Normally I'd suspect the firewall, but I can cURL from the command line to the Internet without a problem. The box can also update it's own software packages, etc. What am I missing? My test is: <?php function http_head_curl($url,$timeout=30) { $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_TIMEOUT, $timeout); curl_setopt($ch, CURLOPT_HEADER, 1); curl_setopt($ch, CURLOPT_NOBODY, 1); curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $res = curl_exec($ch); if ($res === false) { throw new RuntimeException("cURL exception: ".curl_errno($ch).": ".curl_error($ch)); } return trim($res); } // Succeeds, displaying headers echo(http_head_curl('localhost')); // Fails: echo(http_head_curl('www.google.com')); ?>

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• How to Test and Deploy Applications Faster

  - by rickramsey

  photo courtesy of mtoleric via Flickr If you want to test and deploy your applications much faster than you could before, take a look at these OTN resources. They won't disappoint. Developer Webinar: How to Test and Deploy Applications Faster - April 10 Our second developer webinar, conducted by engineers Eric Reid and Stephan Schneider, will focus on how the zones and ZFS filesystem in Oracle Solaris 11 can simplify your development environment. This is a cool topic because it will show you how to test and deploy apps in their likely real-world environments much quicker than you could before. April 10 at 9:00 am PT Video Interview: Tips for Developing Faster Applications with Oracle Solaris 11 Express We recorded this a while ago, and it talks about the Express version of Oracle Solaris 11, but most of it applies to the production release. George Drapeau, who manages a group of engineers whose sole mission is to help customers develop better, faster applications for Oracle Solaris, shares some tips and tricks for improving your applications. How ZFS and Zones create the perfect developer sandbox. What's the best way for a developer to use DTrace. How Crossbow's network bandwidth controls can improve an application's performance. To borrow the classic Ed Sullivan accolade, it's a "really good show." "White Paper: What's New For Application Developers Excellent in-depth analysis of exactly how the capabilities of Oracle Solaris 11 help you test and deploy applications faster. Covers the tools in Oracle Solaris Studio and what you can do with each of them, plus source code management, scripting, and shells. How to replicate your development, test, and production environments, and how to make sure your application runs as it should in those different environments. How to migrate Oracle Solaris 10 applications to Oracle Solaris 11. How to find and diagnose faults in your application. And lots, lots more. - Rick Website Newsletter Facebook Twitter

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• What are some hosted MySQL solutions?

  - by bigmac

  I would like to host a MySQL database somewhere. The basic solution would be to get a VPS, but then I am stuck doing all the sysadmin stuff. It's not terribly difficult if you are not doing anything fancy, but if something goes wrong (like a security breach), it may be hard to resolve or even diagnose in the first place. On the other end of the spectrum, I found Xeround and Amazon RDS. Xeround is not exactly standard MySQL. Amazon seems a bit complex to get started (which is weird because they specifically say it is "simple to deploy"). Why is there nothing in the middle? Is there no demand for a basic hosted MySQL solution?

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• SQLAuthority News – Download Whitepaper – SQL Server 2008 R2 Analysis Services Operations Guide

  - by pinaldave

  SQL Server Analysis Service (SSAS) has been always interesting subject for research. Analysis Services cubes are a very powerful tool in the hands of the business intelligence (BI) developer. They provide an easy way to expose even large data models directly to business users. Microsoft has published very informative white paper on Analysis Services Operations Guide. This white paper is authored by Thomas Kejser, John Sirmon, and Denny Lee. In this guide you will find information on how to test and run Microsoft SQL Server Analysis Services in SQL Server 2005, SQL Server 2008, and SQL Server 2008 R2 in a production environment. The focus of this guide is how you can test, monitor, diagnose, and remove production issues on even the largest scaled cubes. This paper also provides guidance on how to configure the server for best possible performance. It is the goal of this guide to make your operations processes as painless as possible, and to have you run with the best possible performance without any additional development effort to your deployed cubes. In this guide, you will learn how to get the best out of your existing data model by making changes transparent to the data model and by making configuration changes that improve the user experience of the cube. Download SQL Server 2008 R2 Analysis Services Operations Guide Note: Abstract taken white paper. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Download, SQL Query, SQL Server, SQL Tips and Tricks, SQL White Papers, SQLAuthority News, T SQL, Technology

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• Virutal Machine loses network connectivity on Hyper V

  - by Chris W

  We're running a number of VMs on a 6 node failover cluster of blades using Hyper V. We have an intermittent issue (every few days at different times - not a fixed frequency) of VMs losing network connectivity. Console access to the VM suggests all is fine and the underlying blade has normal connectivity. To resolve the problem we either have to re-start the VM or, more usually, we do a live migration to another blade which fires up connectivity and we then migrate it back to the original blade. I've had 3 instances of this happen with a specific VM running on a particular blade however it has happened once with a different VM running on a different blade. All VMs and blades have the same basic setup and are running Windows 2008 R2. Any ideas where I should be looking to diagnose the possible causes of this problem as the event logs provide no help?

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• What causes winsock 10055 errors? How should I troubleshoot?

  - by Tom Kerr

  I'm investigating some issues with winsock 10055 errors on a chain of custom applications (some of which we control, some not) and was hoping to get some advice on techniques to troubleshoot the problem. No buffer space available. An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full. From research, non-paged pool and ports seem to be the only resources which can cause this error. Is there another resource which might cause 10055 errors? Currently, we have perfmon counters setup on the applications and non-paged pool usage looks low in most circumstances. Open TCP connections looks low and I am unaware of another way to monitor ports. Since it only happens in production, we are unable to use more invasive counters. Is there some other tool or procedure you would recommend to diagnose which application is causing the issue?

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• Turning on the wireless card freezes Ubuntu 12.04

  - by Ryan Schram

  I've been using Ubuntu 12.04 for close to a year. Occasionally after booting into Gnome 3, the desktop is unresponsive to cursor clicks. The mouse cursor moves but can't open menus. Also the network icon displays a red error badge instead of the usual gray x indicating that it is off. The only way I have found to solve this is to switch to a terminal shell (Ctrl-Alt-F5), login and kill gnome-session. This is an intermittent and occasional problem. Recently I moved house and set up this computer in my new apartment. Now I have for the first time a new and more difficult problem. Switching on the wireless card (wlan0) to connect to the wifi router causes the desktop to freeze. Switching to a terminal via Ctrl-Alt-F5 doesn't work. The only solution is a hard reboot from the power switch. How can I diagnose the second, more recent problem? Is there a solution? Cheers, Ryan

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• Don't Miss What Procurement Experts Are Talking About. Join the Webcasts starting next week!

  - by LuciaC

  The Procurement team have three Advisor Webcasts scheduled in December with information about new features, tips and tricks and troubleshooting guidance. New Features and enhancements Incorporated in the Procurement Rollup Patch 14254641:R12.PRC_PF.B December 4, 2012 at 14:00 London / 16:00 Egypt / 06:00 am Pacific / 7:00 am Mountain / 9:00 am EasternThis session is recommended for technical and functional users who need to know about the new features and enhancements incorporated in the Procurement Rollup Patch. Topics will include: GCPA Enable All Sites E-Mail PO - .LANGUAGE Read Only BWC Validate Document GBPA OSP Items GL Date Defaulting Cancel Refactoring Action History Cleanup Click here to register for this event. Approval Management Engine (AME) New Features, Setup and Use for Purchase Orders December 6, 2012 at 14:00 London / 16:00 Egypt / 06:00 am Pacific / 7:00 am Mountain / 9:00 am EasternThis is recommended for Functional Users and Application Technical Users who work in the Procurement Module including Purchasing and iProcurement and would like to know more about how to set up and use the Approval Management Engine (AME) for purchase orders.Topics will include: Scope and limitations of AME functionality for purchase orders Setup and use of AME for purchase orders PO Review and PO E-Sign new features Demonstration: Example of scenarios using the new features Click here to register for this event. How to Solve Approval Errors in Procurement December 18, 2012 at 4:00 pm Egypt / 2:00 pm London / 6:00 am Pacific / 7:00 am Mountain / 9:00 am EasternThis session is recommended for technical and functional users who need to know about how to diagnose and troubleshoot common Approval Errors.Topics will include: Basic mandatory setups for approvals of PO documents Differences between Purchase Order Approval and Requisition Approval Process. Troubleshooting of Approval Errors. Basic Setup of AME which can be used in Requisition Approval Process. Click here to register for this event. You can see a listing of all scheduled and archived webcasts from Doc ID 740966.1.  Select the product you are interested in (such as E-Business Suite Procurement) and this will take you to the webcast listing for the product.

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• How to cope with runaway Flash plugin in Google Chrome browser?

  - by Norman Ramsey

  I'm using Google Chrome for Linux, version 5.0.307.11 (Official Build 39572) beta with the Linux Flash plugin version 10.0 r32. Quite often, the Flash plugin goes wild and pegs the CPU with about 95% usage. Laptop gets hot, battery drains. I can diagnose the problem with Chrome's little process monitor (shift-Esc), and I can even kill the plugin, but then when I actually want to use Flash on a page, I can't find a way to restart the plugin; I have to exit and restart Chrome, which with 30 tabs open is a huge hit. Does anyone know what causes this problem? Does anyone have a better workaround (or heaven forfend, a fix)? [I struct out both with search and with Google's help site for Chrome.]

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• NFS Client reports Permission Denied, Server reports Permission Granted

  - by VxJasonxV

  I have two RedHat 4 Servers. The client is 4.6, the server is 4.5. I'm attempting to mount a share from the server, onto the client via NFS. The /etc/exports configuration is as follows: /opt/data/config bkup(rw,no_root_squash,async) /opt/data/db bkup(rw,no_root_squash,async) exportfs returns these (among other) shares, nfs is running according to ps output. I've been attempting to use autofs on the client, but have opted to just mount the share manually considering the issues I'm having. So, I issue the mount request: mount dist:/opt/data/config /mnt/config mount: dist:/opt/data/config failed, reason given by server: Permission denied Ok, so let's see what the server has to say for itself. May 6 23:17:55 dist mountd[3782]: authenticated mount request from bkup:662 for /opt/data/config (/opt/data/config) It says it allowed the mount to take place. How can I diagnose why the client and server are disagreeing on the result?

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• Apache service hung and incoming requests not accepted

  - by Gnanam

  Hi, My production server is running Apache v2.2.4 with mod_mono v1.2.4 on CentOS release 5.2 (Final). Suddenly, Apache service hung during normal usage time (approx. 1 pm EDT). Traffic is not too high at this time. This is the first time we're noticing this kind of behaviour in our server. I noticed from access log that even subsequent requests are also not received, even though there were incoming requests. I then manually tried to invoke my application call from web browser, it never returned successfully but it was still loading. I found no unusual behaviour/activity in: 1) Apache access_log and error_log 2) No kernel level errors found in /var/log/messages I've no other option but ended up restarting Apache service. Any idea on what would cause Apache to hang and thereby not allowing subsequent incoming requests? How do I debug/diagnose when this happens next time? Experts advice/recommendation on this are highly appreciated.

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• Fix invalid objects and components - BEFORE you upgrade!

  - by Mike Dietrich

  We are currently running a Tech Challange Workshop with 25 Oracle consultants and support folks from all over EMEA. We call it Tech Challange because we seperate these experts having between 5 and 20 years of Oracle experience into 5 groups - and each group has to complete their special challange such as moving a database from 10.2 to Exadata V2 or upgrading from single instance 10.2 to Real Application Clusters 11.2 with the new Grid Infrastructure. Actually we start this training with a bit presentation pieces about upgrades, Real Application Testing and Golden Gate. And one topic I always point out: Keep your database tidy before the upgrade!!! Clean up all invalid objects - especially in SYS and SYSTEM user schema BEFORE you upgrade. Use utlrp.sql to recompile invalid objects. Use Note:753041.1 to diagnose and fix invalid components. Do this always BEFORE you start the upgrade. Even if it may take some time. Otherwise your upgrade could fails or significant parts of the database packages could be invalid after the upgrade as well. I just came across this today as one group had ~240 invalid objects in the database - and due to the fact that the original system was still there could proof that the objects had been invalid before. Good job, BUT ... :-)

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• Windows SBS 2011 DNS Role (service) failing & needing restarting

  - by HaydnWVN

  Have a Windows SBS 2011 with Exchange that is handling all DNS for the network. Since getting a 3rd party (Hardware & Support) to setup a recieving FTP service and restricting Exchanges memory useage for another 3rd party product (Stock software) the local network seems to periodically 'lose the internet connection'. Delving deeper I found that the DNS service is somehow failing/stopping without the actual service on the server reporting such (nothing in event logs). A simple restart of the 'DNS Role' on the server solves the problem. The manager onsite reports that he has to do this most days in the afternoon - yet not at the same time and other days it works fine without a restart being required. I'm unable (lacking sufficient SBS2011 knowledge) to diagnose this further, ideally I would like the DNS Role to report (and log) the failure, then automatically restart itself.

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• ReadyNAS running slow

  - by Simon Callan

  We have a NetGear ReadyNAS NV+ that we are using just for filestorage. While it appears to be running normally as a fileserver, the admin functions run incredibly slow. Sometimes, backups take so long that they don't finish before the next run is due to start, and if I try to look at the backup logs or download the system logs, all I get is the busy "whirling wheel", until I get a "System is busy message". Is this just the system being bolshy, or is it a sign of problems to come, and what can I do to diagnose them?

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• Ping isn't acting accurate?

  - by Earlz

  I've been trying to diagnose some latency issues with my internet connection. I've been lagging out of online video games and such, which of course could be their server's fault. So, I've been running ping some. It doesn't indicate anything unusual, but it does act a bit strange. I can start it with something like ping internethost -i 0.1 so that it will send a ton of packets, and every 10-20 seconds it will appear to just freeze for 2 or 3 seconds. The packets are still being received in the right order though, and there is no packet loss. The weirdest thing is that after the little freeze up, it will usually just report a ping time that is about 10-30ms higher than the average. How does this happen? Is ping still being accurate? I'm using Arch Linux. The host I'm pinging is my website, which shouldn't be doing any kind of ping slowing or filtering.

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• Mac OSX server command equivalent for dhclient?

  - by John Hall

  Is there an MacOS command that makes a dhcp request, and renews the old lease, drops it for a new one, or usefully reports errors or lack of response from a dhcp server? This would both help fix networking on the machine after problems on the network without rebooting and would also be useful to diagnose wider networking problems from a mac. I can not find any command equivalent of dhclient though obviously some component must be serving this purpose. The question is, is that component exposed to a command line interface? I am biased to the command line for these features and may have overlooked settings panels or tools that might solve it using a gui interface. I believe this question is at the heart of this other question: Is there an equivalent command for 'init.d/networking restart' in OS X

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• Apparent leak in Mozilla Firefox

  - by LeopardSkinPillBoxHat

  I use Mozilla Firefox 3.6 all day, opening and closing tabs quite regularly. I am noticing over time that the firefox.exe process size keeps growing and growing over time. Initially I put this down to memory fragmentation caused by opening and closing tabs, but now I am suspecting that there is a memory leak in one of the add-ons that I have installed. The problem I am seeing is that when the process size gets to about 1.5GB in the "Mem Usage" stat in Task Manager (and it gets there quite regularly), Firefox freezes up. Does anyone have any ideas about how I could diagnose whether: Any of the add-ons are leaking memory? Something else is causing this problem?

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• IMAP can't access virtual account sharing name with local user account

  - by chernevik

  I am setting up a postfix/dovecot mail server with virtual accounts, per the Chris Haas tutorial. I'm finding that virtual users who also have local user accounts on the mail server cannot access their email remotely via IMAP. They're told they cannot login. (I'm using Thunderbird for that). These same users can login when emulating IMAP locally via telnet. Virtual users without local accounts have no trouble with IMAP access from remote clients. These local user accounts have vestiges of prior efforts in their home directories: mbox files, Mail and mail directories. I've looked at the logs for clues to where the remote login process is failing (dovecot authentication failure? confusion over where emails are stored?) but found nothing helpful. I haven't found much in the dovecot or postfix documentation that describes the IMAP login process and expectations in enough detail to help me diagnose this. So: how do I go about identifying the problem and researching a solution?

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• Who is code wanderer?

  - by DigiMortal

  In every area of life there are people with some bad habits or misbehaviors that affect the work process. Software development is also not free of this kind of people. Today I will introduce you code wanderer. Who is code wanderer? Code wandering is more like bad habit than serious diagnose. Code wanderers tend to review and “fix” source code in files written by others. When code wanderer has some free moments he starts to open the code files he or she has never seen before and starts making little fixes to these files. Why is code wanderer dangerous? These fixes seem correct and are usually first choice to do when considering nice code. But as changes are made by coder who has no idea about the code he or she “fixes” then “fixing” usually ends up with messing up working code written by others. Often these “fixes” are not found immediately because they doesn’t introduce errors detected by compilers. So these “fixes” find easily way to production environments because there is also very good chance that “fixed” code goes through all tests without any problems. How to stop code wanderer? The first thing is to talk with person and explain him or her why those changes are dangerous. It is also good to establish rules that state clearly why, when and how can somebody change the code written by other people. If this does not work it is possible to isolate this person so he or she can post his or her changes to code repository as patches and somebody reviews those changes before applying them.

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• Brand new battery is 100% charged but at 0% capacity

  - by Chris Conway

  I just bought a brand new battery to replace one that had seemingly died. I followed the instructions that came with the battery and charged it overnight, then ran my computer on battery until it was in a critical state and charged it overnight again. Now the battery appears to be 100% charged and at the same time at 0% capacity—when it's plugged in it doesn't charge and when it's unplugged the computer immediately goes into low power mode. I've taken the battery out and checked the contacts. I've rebooted the system with and without the battery. Nothing seems to help. I'm not sure if I should blame the battery, the laptop, the charger, or the power management software for this state of affairs. The obvious answer would be the battery but I bought this battery because another year-old battery exhibited similar behavior—I assumed it was dead and a Dell tech came to the same conclusion. I'm loathe to order another new battery without first exploring other explanations. What can I do to diagnose this problem? Here's the /proc info: $ cat /proc/acpi/battery/BAT0/state present: yes capacity state: critical charging state: charged present rate: 1 mA remaining capacity: 0 mAh present voltage: 9754 mV $ cat /proc/acpi/battery/BAT0/info present: yes design capacity: 6600 mAh last full capacity: 6789 mAh battery technology: rechargeable design voltage: 11100 mV design capacity warning: 660 mAh design capacity low: 200 mAh cycle count: 0 capacity granularity 1: 66 mAh capacity granularity 2: 66 mAh model number: DELL WK serial number: 4043 battery type: LION OEM info: SMP

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• Cannot Access a Shared Folder Using Windows 2008

  - by peter

  Hi All, I have a NAS drive, and this is sharing some folders. I cannot access those folders from a windows 2008 machine which is on the network. The are both connected to the same network switch. e.g. if I go like this, \\server\ or \\server\folder I get the message 'windows cannot access \\server check the spelling, click diagnose' etc. Error code: 0x80004005 The thing is that I can connect to this shared drive from a windows 7 laptop connected wirelessly to the same network. I can ping the server from windows 2008, but only if I use the IP address, not the server name.

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• Can't connect to Apple Time Capsule in home network using Home Plugs from Win 7 Machine

  - by Eugene

  I have the following home network setup with subnet 255.255.255.0 but recently moved my time capsule to a different location when I added a third Home Plug and can no longer ping or map a network drive to it from the Windows 7 Machine. However using Airport Utility on the Windows 7 machine I can manually configure the Time Capsule. Using a Macbook on WIFI Network 1 or 2 - I can backup to the time capsule, so its accessible via both the router wifi network and the time capsule wifi network. The Time Capsule is set to BRIDGE function - ie no NAT or DHCP server enabled. Any bright sparks out there that can help diagnose the problem? Router (192.168.1.254) WIFI Network 1 | | |---- Home Plug one |---- Home Plug Two | |---- Computer A Windows 7 (192.168.1.160) | |---- Printer (192.168.1.69) |---- Home Plug Three | |---- Apple Time Capsule (192.168.1.150) WIFI Network 2 |---- Smart TV (192.168.1.70) | |---- Apple TV (192.168.1.4)

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• laptop overheating ran defraggler and now its not as hot

  - by Marko

  Trying to diagnose and fix an overheating Acer 5735 laptop, running speedfan and doing general workload to try and cause the overheat conditions. I notice that windows xp is badly fragmented according to defraggler, at 58% fragmentation. So I defrag whilst watching the speedfan window, which was at the start reporting high warning style symbols for all of the sensors. After the defrag, I rebooted and ran a few programs, and even defraggler again and the sensors in speedfan all reported green i.e. not high. Wondering if there is a correlation between windows fragmentation causing the hard drive to work harder and produce more heat inside the laptop? dont want to just assume that the problems are resolved, so either speedfan is not accurate enough or fragmentation can lead to additional hard drive heat? All comments or suggestions welcome.

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