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• postgres memory allocation tuning 2

  - by pstanton

  i've got a Ubuntu Linux system with 12Gb memory most of which (at least 10Gb) can be allocated solely to postgres. the system also has a 6 disk 15k SCSI RAID 10 setup. The process i'm trying to optimise is twofold. firstly a single threaded, single connection will do many inserts into 2-4 tables linked by foreign key. secondly many different complex queries are run against the resulting data, using group by extensively. this part especially needs to be optimised. i have four of these processes running at once in order to make use of the quad core CPU, therefore there will generally be no more than 5 concurrent connections (1 spare for admin tasks). what configuration changes to the default Postgres config would you recommend? I'm looking for the optimum values for things like work_mem, shared_buffers etc. relevant doco thanks!

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• Compaq Presario CQ40 unexpected turn off

  - by CRoshanLG

  My Compaq Presario CQ40 (yeah, its pretty old) suddenly turns off after about 1/2 - 1 hour usage without any notice or warning. The power cable and adapter works fine (indicator bulbs show that power is given to the laptop), but it seems like machine suddenly plugged off from the power source. And when I try to switch it on, after the sudden turn off it simply won't turn on. I can only turn it on after letting it to rest for at least couple of hours! ** The battery has been dead for some time now, but it has been working fine on direct power supply until recently. Has anyone encountered this? and hopefully knows any cure?

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• Is it possible to format ps RSS (memory) output to be more human friendly?

  - by metasoarous

  Executing ps ux returns a nice list of process information, easy to grep through or watch. However, there doesn't seem to be much flexibility in the memory usage output; the RSS (resident set size) is printed in kB, which for large processes is hard to read (especially at a glance), and %MEM gives 100 × RSS / system_memory. The du utility has a lovely -h flag which prints space in a more user friendly fashion. I have not been able to find anything equivalent for ps. Is there a special formatting trick that can accomplish this?

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• NTFS write speed really slow (<15MB/s) on Ubuntu

  - by Zulakis

  When copying large files or testing writespeed with dd, the max writespeed I can get is about 12-15MB/s on drives using the NTFS filesystem. I tested multiple drives (all connected using SATA) which all got writespeeds of 100MB/s+ on Windows or when formatted with ext4, so it's not an alignment or drive issue. top shows high cpu usage for the mount.ntfs process. AMD dual core processor (2.2 GHz) Kernel version: 3.5.0-23-generic Ubuntu 12.04 ntfs-3g version: both 2012.1.15AR.1 (Ubuntu default version) and 2013.1.13AR.2 How can I fix the writespeed?

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• RAID P410i and P812 performance issues

  - by Alexey

  I'm having much trouble with I/O performance of HP DL360 server with two RAID controllers - P410i and P812, Windows Server 2008, 36 GiB RAM and 16 x Intel Xeon x5550. The server runs a bunch of tasks producing heavy sequential I/O, and after about 20-30 minutes of intensive work it looks like the tasks are stuck, not using CPU and with enough free memory (so this cannot be a bottleneck). The same tasks were running quite well on the older server (Windows Server 2003, 4 x Intel Xeon, 12 GiB RAM). RAID cache is present, write-cache battery is installed. Cache is configured as 25% readahead/75% writeback. The swap file resides on the logical disk served by P410i and other logical disks are on P812. Can someone tell me what can be the matter of this? Is this a hardware problem or misconfiguration?

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• Hard drive trouble trying to recover data

  - by DEmetria

  How to get my information off my old hard drive to my new one So I wanna know can anyone help me Laptop stop working and have me a hard disk error I finally got it to boot up again after playing with it, and I tried to copy my stuff and it froze on me and hasn't booted since Bought another hard drive and ended up making an image of my friends computer but couldn't get my stuff off my old drive so I tried the freezer method now and I put it in for two hours and it didn't boot but I'm putting it back in for 12hrs So my end result is I just wanna get my drive up enough to create an image of my CPU to my new hard drive and is there another way I could do it if my hard drive won't boot!! But here's the kickers when I made the image of my friends computerized up loaded it to the new hard drive and I have my old hard drive plugged up to an USB enclosure so I need help. Thanks in advance!!!

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• Tool to maintain/keep track of filesystem content integrity?

  - by Jesse

  I'm looking for a tool to maintain the integrity of a filesystem and it's contents using checksums. Effectively storing a list of checksums/filename pairs somewhere on the filesystem in a way that can be verified later if files are somehow damaged or lost. Git does what I want, but because it stores the contents of every file in it's object database, the disk usage will at least double. And the fact that it does not provide a progress bar when scanning files tells me it was not designed for the multi-terabyte filesystem I have in mind. I can do this crudely by storing the output of md5deep, but is there a tool specifically designed for this purpose, using whatever smarts possible to make the process efficient?

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• Shared SQL Server 2008

  - by nazaf

  Hi, I have a Windows Hyper VPS plan with 1024 MB of RAM. After installing SQL Server 2008 Express, my memory usage went up to 75% without running my site yet. I know that SQL Server consumes a lot of memory, so I decided to host my DB on a shared server. Which of the following is more scalable: install my DB on my VPS, or on a shared server ? If the latter, then can you recommend me a good shared server? Thanks.

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• Post Error, Fixed/Removable Media Error

  - by Dan

  Hi, I really do not know what I am missing here. I ordered parts for a new server. The board is an Intel s3420GP. From the diagnostic LEDs I get the error message: 0xB1h which corresponds to "Fixed Media: Disabling fixed media" and 0xB8h which corresponds to "Removable Media: Resetting removable media device." I can not for the life of me figure out what it is talking about. I have two identical motherboards and both gave the error message. I don't have a second CPU yet, so I can't test that. There are no beeps or anything. It seems the server resets every 10 seconds or so (the speaker does work, I put the RAM in the wrong slots on purpose to test this out, and the correct error POST code came up) Please help me, I'm not sure where else to turn or to ask

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• Strange error with VS2008 on Windows 7

  - by Christian

  We have a solution with two projects, one of them is a Silverlight 3 application which is embedded on the other ASP.NET MVC project. Just recently an error started to appear which makes the build fail. Here is the output: `------ Build started: Project: DotCoquiMap, Configuration: Debug Any CPU ------ C:\Program Files\MSBuild\Microsoft\Silverlight\v3.0\Microsoft.Ria.Client.targets : warning : Could not find necessary input file 'C:\Users\Michael\Documents\DotCoqui\trunk\DotCoquiMap\Bin\Debug\DotCoquiMap.dll'. Done building project "DotCoquiMap.csproj" -- FAILED. ------ Build started: Project: DotCoquiProject, Configuration: Debug Any CPU ------ C:\Windows\Microsoft.NET\Framework\v3.5\Csc.exe /noconfig /nowarn:1701,1702 /errorreport:prompt /warn:4 /define:DEBUG;TRACE /reference:C:\Users\Michael\Documents\DotCoqui\trunk\DotCoquiMap\Bin\Debug\DotCoquiMap.dll /reference:..\ExternalLibraries\itextsharp.dll /reference:..\ExternalLibraries\MvcMembership.dll /reference:..\ExternalLibraries\PagedList.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Configuration.dll /reference:"C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Core.dll" /reference:"C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Data.DataSetExtensions.dll" /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Data.dll /reference:"C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Data.Linq.dll" /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Drawing.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.EnterpriseServices.dll /reference:"C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Web.Abstractions.dll" /reference:............\Windows\assembly\GAC_MSIL\System.Web.DataVisualization\3.5.0.0__31bf3856ad364e35\System.Web.DataVisualization.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Web.dll /reference:"C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Web.Extensions.dll" /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Web.Mobile.dll /reference:"C:\Program Files\Microsoft ASP.NET\ASP.NET MVC 1.0\Assemblies\System.Web.Mvc.dll" /reference:"C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Web.Routing.dll" /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Web.Services.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll /reference:"C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Xml.Linq.dll" /debug+ /debug:full /optimize- /out:obj\Debug\DotCoquiProject.dll /target:library Controllers\AccountController.cs Controllers\AdministrationController.cs Controllers\ApiController.cs Controllers\CampaignsCategoriesController.cs Controllers\CampaignsController.cs Controllers\CampaignsFormViewModel.cs Controllers\CampaignStatisticsController.cs Controllers\CampaignStatisticsDetailsViewModel.cs Controllers\ControllerHelpers.cs Controllers\CountriesController.cs Controllers\ErrorController.cs Controllers\HomeController.cs Controllers\MapController.cs Controllers\MediaController.cs Controllers\MediaViewModel.cs Controllers\NewsController.cs Controllers\OrganizationsController.cs Controllers\OrgCenterController.cs Controllers\UserAdministrationController.cs Default.aspx.cs Global.asax.cs Models\Campaigns.cs Models\CategoriesRuleValidation.cs Models\DotCoquiDBModel.designer.cs Models\DotCoquiRepository.cs Models\DQcodes.cs Models\FileRepository.cs Models\ISmtpClient.cs Models\JsonModels.cs Models\OrgCenter\IndexViewModel.cs Models\SmtpClientProxy.cs Models\Statistic.cs Models\User.cs Models\UserAdministration\DetailsViewModel.cs Models\UserAdministration\IndexViewModel.cs Models\UserAdministration\RoleViewModel.cs Properties\AssemblyInfo.cs error CS0006: Metadata file 'C:\Users\Michael\Documents\DotCoqui\trunk\DotCoquiMap\Bin\Debug\DotCoquiMap.dll' could not be found Compile complete -- 1 errors, 0 warnings ========== Build: 0 succeeded or up-to-date, 2 failed, 0 skipped ==========` And here is the errors / warnings: Warning 2 Could not find necessary input file 'C:\Users\Michael\Documents\DotCoqui\trunk\DotCoquiMap\Bin\Debug\DotCoquiMap.dll'. DotCoquiMap Error 1 Metadata file 'C:\Users\Michael\Documents\DotCoqui\trunk\DotCoquiMap\Bin\Debug\DotCoquiMap.dll' could not be found DotCoquiProject The DotCoquiMap is not getting built therefore the DotCoquiProject (ASP.NET MVC) cannot find the .dll. Now here is the really odd thing, under Windows XP the very same code compiles and runs perfectly.... under windows 7 it gives us these errors. It is the very same code, we have tested it on 3 different Win7 machines to no avail. Help will be really really helpful. Thanks in advance.

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• Is it possible to rename an open Word document without closing it?

  - by RoboShop

  I just ask this question as I do not believe that after so many versions of Word, it wouldn't exist. Usually when I'm working on a document and I realize I have to rename it, I have to close the document down, go to file explorer and then rename it, and then opening it up again. It's a procedure that's so ingrained in my usage pattern that I didn't realize until now that I'm actually having to open and close multiple windows/ applications etc. simply to rename a file. Surely, it's the year 2012, I should be able to do a simple thing like that with a few clicks right? So is there a way to just rename the file name of a word /excel / office document without having to close it first?

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• Instant messanger capable of offline messaging & tolerant of network interruptions

  - by Terry

  I am looking for an instant messaging solution to facilitate communications between recovery vehicles in remote rural areas. All the vehicles have internet connections, but they are intermittent depending on location. Ideally we'd like something that has the following features: Offline messaging: messages sent to clients who are offline will be delivered when they next come online, regardless of whether the sender is still online or not. Lightweight: CPU cycles are limited on the machines in these vehicles. A bloated solution will be an issue. Client platform is primarily win32, but support for osx/linux/mobile devices would be a bonus. Non-chatty: Bandwidth is a precious commodity for us, so services which use a minimal amount are ideal. Fault tolerant: We see plenty of packetloss and high latency, so whatever we use needs to be able to function in trying network conditions. I'm not fussed if we use a hosted platform like gtalk/skype/msn/icq/whatever, and likewise I can run a server if need be. Suggestions would be appreciated!

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• How to diagnose very slow pagefile

  - by svick

  Quite often, one of the applications I use freezes (“does not respond”) for a while, in extreme cases for few minutes. This happens especially when when switching apps. During this time, the HDD light flashes constantly and perfmon show that HDD is used 100% of the time (OTOH, CPU isn't) and that pagefile is being read (which is to be expected when switching apps), but at a very slow rate. When I sort the disk table in perfmon by read or write, the file read and wrote the most is the pagefile, but it's still quite low rate (I don't remember the numbers). How can I diagnose what's causing this? I use Windows Vista, and the computer is quite ordinary two years old laptop.

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• Why can't I grant exec on dbms_lock.sleep() OR create a procedure using it (but I can run it fine on its own)

  - by Richard Green

  I am trying to write a small bit of PL/SQL that has a non-CPU burning sleep in it. The following works in sqldeveloper begin dbms_lock.sleep(5); end; BUT (as the same user), I can't do the following: create or replace procedure sleep(seconds in number) is begin dbms_lock.sleep(seconds); end; without the error "identifer "DBMS_LOCK" must be declared... Funny as I could run it without a procedure. Just as strange, when I log in as a DBA, I can run the command grant exec on dbms_lock to public; and I get ERROR at line 1: ORA-00990: missing or invalid privilege This is oracle version "Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production"

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• Will new Acer Revo (with Atom 330) be fast enough to be MythTV client/server?

  - by vava

  As a geek I really like Atom CPUs but can't find a reason to buy one yet :( Although I was thinking about making my own DVR with NAS and media center functionality. Unfortunately, even today's Acer Revo, built on ION platform is not fast enough for streaming Full HD videos. So what do you think, will new two core CPU make it better, will it be able to show Full HD videos, store them to disk and transfer something over the network at the same time? Will it be able to scale videos from Hulu and YouTube to fullscreen?

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• Loss of feature set with VMware EVC

  - by Peter

  If I have two machines both 3rd Generation AMD Opteron, one Shanghai & one Istanbul and I can vMotion between them. Does it buy me anything to enable EVC at the 3rd Generation AMD level? Will I lose any CPU features? My thoughts are, I can enable EVC 3rd Generation with running VMs and I can't enable 2nd Generation EVC with running VMs. I figure there won't be a lose in any features because if there was a reduction in feature set then I couldn't enable EVC with running VMs.

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• Google Reader offline sync (Gears) not syncing, stuck at 0%

  - by Yang

  I'm using Google Chrome, and for some reason starting over the weekend or Friday, I haven't been able to get Google Reader to sync for offline reading. When I hit the sync button, it just starts spinning and says: "Status: Downloading 2000 items...0% completed. Please wait..." There's no CPU, network, or disk activity on my machine, and it remains in this state indefinitely. I tried going to Chrome Settings, uninstalling Reader, navigating to Reader, and reinstalling Reader as a Gears app, to no avail. Any hints? Thanks in advance.

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• General video performance affected on Mac OSX 10.5 (PowerBook G4)

  - by r0ca

  Hi all, I'm quite new to Mac and I just got a PowerBook G4 for free. I installed OSX 10.5 on it and for the first two weeks, everything was going kinda smooth even if this is similar to a P3. I'm not expecting awsome video performance but at least be able to watch some videos from Youtube. Yesterday night, I installed Office 2008 for mac and this morning, even after a reboot, my computer is way much slower that I used to know. I watched a youtube video and the framerate was 1:1. I also noticed it on flash adds, it's way slower! Is there anything that I can do to increase video performance, see what's the process list running and taking more GPU or CPU, what's taking more ram and stuff like that?! What do you guys, Mac pros, would do on an old laptop with OSX 10.5 Thanks!

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• Out of sync audio video using mencoder

  - by 1ch1g0

  hi i converted a mkv (matroska) file to avi using ffmpeg: ffmpeg -i input.mkv -f mp4 -vcodec mpeg4 -sameq -r 29.97 -b 512kb -acodec ac3 -ab 128kb -vol 512 output.avi the output file plays fine using mplayer. after that, i using mencoder to insert subtitles: mencoder output.avi -o new.avi -oac pcm -ovc lavc -subfont-text-scale 3 -sub subtitle.srt however, after i play back the video "new.avi", the video and audio is out of sync. What options can i put into mencoder to sync the A/V. ? I have also tried ffmpeg -newsubtitle option but can't get it work. Any examples of usage of -newsubtitle would be greatly appreciated. thanks

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• Are mobo raid controllers based on Intel ICH10R southbridge still considered software Raid?

  - by Breadtruck

  So do you still need specific software/drivers (intel matrix?) installed to manage the raid controller, setup the array. If the raid chipset is on-board the motherboard and it uses the CPU, and say I am using a Core 2 Quad Q9550, would a hardware based card still out perform the motherboard chipset? This is for a home workstation and I could spend $300 on a areca ARC-1210 PCI-Express x8 SATA II but I want to be able to justify the money for the raid card. My motherboard is a GIGABYTE GA-EP45-UD3P UPDATE: I was going to RAID5 using 4 500 GB drives, and I was going to buy a controller card but this article got me thinking hmmm....Toms-Southbridge Battle

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• Rough estimate for speed advantage of SAN-via-fibre to san-via-iSCSI when using VMware vSphere

  - by Dirk Paessler

  We are in the process of setting up two virtualization servers (DELL R710, Dual Quadcore Xeon CPUs at 2.3 Ghz, 48 GB RAM) for VMware VSphere with storage on a SAN (DELL Powervault MD3000i, 10x 500 GB SAS drives, RAID 5) which will be attached via iSCSI on a Gbit Ethernet Switch (DELL Powerconnect 5424, they call it "iSCSI-optimized"). Can anyone give an estimate how much faster a fiber channel based solution would be (or better "feel")? I don't mean the nominal speed advantage, I mean how much faster will virtual machines effectively work? Are we talking twice the speed, five times, 10 times faster? Does it justify the price? PS: We are not talking about heavily used database servers or exchange servers. Most of the virtualized servers run below 3-5% average CPU load.

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• Need Recommendations: Network Software and Hardware Setup for small firm

  - by Rogue

  Will be starting a small graphics design firm soon, with 20 employees. Therefore need software to manage the network. Have bought a bulk license of Windows 7. I have a spare computer which can act as a server if necessary, but its an ancient Dell machine (Pentium-III). If required I would purchase an extra machine, but would like to avoid unnecessary costs at start up. Following are the main functions that I would like to perform: Need to monitor\control network traffic and internet usage, restrict access to certain websites Alerts when access to certain software's, and when trying to tamper with privileges Ability to view desktops of any computer at any given time Limit access to certain hardware like USB ports,etc Limit access to folders on the computer Log/Report of all actions including keystrokes performed on any computer Local Network chat and talk client Collaboration and Work logs Any Software available to do all of the above and also any additional hardware required besides network switches, network card's and CAT5e cables. Any other recommendations besides the above mentioned hardware setup

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• application monitoring tools

  - by Shachar

  we're an ISV about to deploy our SaaS application over the internet to our end users, and are currently looking for an application monitoring solution. In addition to monitoring the usual OS-level suspects (I/O, disk space, logs, CPU, RAM, swapping, etc.), we're also looking to monitor, alert and report on internal application events, conditions, and counters (think queue size for internal service, or latency of a service we're getting from a third party via custom APIs). We're started looking at Nagios, Zenoss, etc., but found out those do only low-level stuff, and are currently looking at MOM and ManageEngine. Still, they are far from being an custom app monitoring tool. So - do you have anything to suggest?

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• How should I isolate computers with different roles on a network

  - by fishhead

  I work in an industrial plant and we have one network(physical wire) that us used for both office usage and for process systems. The office computers are only used for typical office needs but occasionally do connect to the process computers to obtain information from a sql server or for some other purpose. A new initiative is in the works and is rolling down hill from corporate and that is to standardize how the the computers are used at work and they would be severely locked down and only a standard set of applications will be allowed to execute. one of the requirements is to also have non office computers isolated from the company domain. our non-office computers are a mix of Man-Machine interfaces and sql-servers all running software that non standard. My question is, how can we divorce the control systems computers from the company domain but still have access to the servers from the company domain. thanks

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• How should I isolate computers with different roles on a network

  - by fishhead

  I work in an industrial plant and we have one network(physical wire) that us used for both office usage and for process systems. The office computers are only used for typical office needs but occasionally do connect to the process computers to obtain information from a sql server or for some other purpose. A new initiative is in the works and is rolling down hill from corporate and that is to standardize how the the computers are used at work and they would be severely locked down and only a standard set of applications will be allowed to execute. one of the requirements is to also have non office computers isolated from the company domain. our non-office computers are a mix of Man-Machine interfaces and sql-servers all running software that non standard. My question is, how can we divorce the control systems computers from the company domain but still have access to the servers from the company domain. thanks

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