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• EBS+RAID10+XFS slower than EBS+RAID10+EXT3 using MySQL?

  - by Johann Tagle

  We're currently using EC2 with 16 EBS volumes in RAID10 configuration for our MySQL data. I know some people don't recommend to put EBS volumes to RAID but that's not what I'm concerned about at the moment. Current format is ext3, but we're experimenting with moving to xfs, given many reports that it is faster. However, we're actually experiencing a performance degradation when the partition was converted to xfs - a benchmark run with inserts, updates, selects and deletes was more than 10 seconds slower using xfs. Any idea what could be the problem? Below is the fstab entry (really only changed ext3 to xfs). Database tables are innodb and we are using innodb_file_per_table. /dev/mapper/vg_data-lv_data /data xfs noatime 0 0 Thanks.

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• Terminal Services - MS Access Frequently "Not Responding"

  - by jonfhancock

  Exposition: We use a program built in MS Access that I serve via Terminal Services. I just installed a new TS Server with a Quad Core 2.6GHz Xeon, 8GB RAM, and 4 SATA drives in a RAID 0. In installed Server 2008 R2 (64bit obviously). It's only role is TS. The problem: With just a few sessions (under 10), I start getting frequent Not Responding messages in each session. When it happens, the users aren't doing anything particularly taxing, just form navigation and simple insert queries. I can live with some stalls, but it is visually jarring in WS08 because the screen goes gray, and it presents a dialog offering to wait or close with some other options. Questions: Any suggestions for improving performance and reducing hangs? Is it possible to disable the dialog (always wait) and screen graying?

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• VirtualBox: Host OS processor is spiked while guest OS virtual processor is idle?

  - by Greg Mattes

  I'm running Windows XP 32-bit on Windows Vista 64-bit with VirtualBox 3.0.6. Whenever I run the XP VM, Vista (host) reports 100% cpu utilization even though XP (guest) reports between 1-5% cpu utilization. The host box has 2 GB of physical RAM. The guest/vm is configured with 512 MB. The host box has a 64-bit AMD processor. No apps (other than VirtualBox) are running on either host, they're just idling. Any guesses as to why the host processor is spiked? I've enabled various advanced features for the XP guest in the hopes of having better performance: Settings → System → Motherboard: Enable IO APIC Settings → System → Processor: Enable PAE/NX Settings → System → Acceleration: Enable VT-x/AMD-V and Enable Nesting Paging

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• Cheap windows shared hosting service

  - by Elangovan

  Hi I have recently purchased a domain from go daddy, now I am looking for a cheap windows hosting. Following are my requirements Shared Windows hosting Should be cheap in price Should have at least one SQL server Db and one mysql db. Should support atleast asp.net 3.5 and php Will be good if it has support for asp.net mvc (no problem even if it is not available also) Should be able to install third party blog sites. Bandwidth, total space and performance are not very important. Silverlight is also an added advantage (no problem even if it is not available also). There should be no advertisement or banner added by the hosting company in the site. Should have support for subdomains

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• What's the best solution for file sharing in my case? DAS or NAS?

  - by jakub

  I want to have in my network small, cheap and energy efficient server with will be fully customizable (Gnu/Linux, OpenBSD). What is more I want to have big, redundant storage in my network and access to it via server. I have already small terminal without hard drive (no SATA/PATA, one drive on USB) which works fine. I don't want to buy big server, or to use regular computer for that. It's not cheap. I thought about a small case (ITX?), and cheap computer in this with SATA ports, but I cannot find anything interesting :( I thought about NAS in network and server independently and booting server from NAS, I'm not sure which technologies will be good for that, and I don't know what with performance. Direct connection to NAS through network from workstation is next pro for that. What do you think about DAS? It will be good for that?

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• Remote Desktop not following display settings

  - by John

  I have my RDP client set up to use highest settings for connecting to another PC on my LAN, which has display settings 1280x1024x32bit. RDP is specifically set to use 32bit depth, but when I connect it drops to 16bit. The PC I connect to is (amongst other things) used to do some 3D graphics. I don't expect great performance, just to check it works... but it doesn't over RDP, the 3D app doesn't think the hardware is the same. Does RDP's integration with Windows mean it is providing some virtualised rendering system? Should I use something less 'clever' like VNC, to literally screen-grab the contents of the screen without altering the settings?

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• Drivers for Quick Cam pro 9000 on Windows 7

  - by runaros

  I have a Logitect Quick Cam Pro 9000 that I want to install on my Windows 7 installation. The user manual specifies that I have to install the software before I install the camera. But my experience is that software from hardware vendors tend to decrease computer performance, so I was wondering if this camera will work by only plugging it in and letting Windows 7 find and install the drivers for it. I could've just tried installing it of course, but again, hardware vendors are notorius for fucking up things, and I wouldn't want to make it impossible to install the camera by doing things in the wrong order, hence the question here on SuperUser because I assume somebody is more knowledgeable than me on this subject.

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• Best way to duplicate databases nightly?

  - by Margaret

  Hey all We just got two new servers, that are running Windows Server 2008. The intent is to make the machines pretty much identical, copying the content of the master to the slave on a nightly basis, so that if anything fails, the second copy can stand in immediately. It doesn't need to be up-to-the-minute mirroring, though I suppose that wouldn't hurt if performance is not affected. The two machines will, amongst other things, each be running an instance of SQL Server 2008. The aim is to duplicate the databases on the master down to the slave on a nightly basis. Unless I'm misunderstanding, the slave databases in mirrored databases require the primary to be present to work correctly; I'm hoping for some solution where we have a second machine that can be up and running with minimal downtime if the first one falls over. Am I misunderstanding mirroring? Is that the best way to do things, or should I use some other mechanism? If so, what?

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• What desktop chipsets support AMD's Rapid Virtualization Indexing?

  - by netvope

  Rapid Virtualization Indexing (RVI) is a hardware virtualization feature that can potentially give significant performance improvement. Intel's equivalent is Extended Page Tables. See http://en.wikipedia.org/wiki/Rapid_Virtualization_Indexing for more details. My question is: Does RVI require motherboard or chipset support? If yes, what desktop chipsets support it? I've ordered a Phenom II CPU (which supports RVI) but I haven't bought the motherboard. I'll install XenServer or VMware ESXi (which both support RVI) on the new computer.

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• Explorer.exe keeps crashing if effects are enabled

  - by Allende

  The explorer.exe keeps crashing before every minute after starts when all the effects are activated. These are the details of the error: Problem signature: Problem Event Name: InPageError Error Status Code: c0000185 Faulting Media Type: 00000003 OS Version: 6.1.7600.2.0.0.256.48 Locale ID: 1033 Additional Information 1: a7aa Additional Information 2: a7aa91f17ea749d42a4de3b390fa5b3d Additional Information 3: a7aa Additional Information 4: a7aa91f17ea749d42a4de3b390fa5b3d Read our privacy statement online: http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409 If the online privacy statement is not available, please read our privacy statement offline: C:\Windows\system32\en-US\erofflps.txt I suspect there's a problem with my hard drive ('cause I already have to format/install twice before this error) but not pretty sure why if I disable all the effect (Performance options) help to stop the issue. Anyway if someone have any idea, thanks. I already replace shell32.dll and explorer.exe using the windows 7 dvd Laptop Model: ProBook 4520s Windows Version: Profesional 32 bits. My regards

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• XPP-32 over W7-64 on music production laptop

  - by quarlo

  I need to upgrade my laptop and need high performance for music production (recording and mixing). My audio interface manufacturer seems to be unable to successfully convert their drivers to 64-bit. I do not trust a virtual machine to handle real-time audio recording at low enough latency so ... I would like to install XP Pro 32-bit on a separate partition and dual boot since most of the machines that can handle this application now ship with Windows 7 64-bit flavors. I'd like to transit to 64-bit over time assuming M-Audio does eventually get a handle on 64-bit drivers, but really need to ensure that I can stay at 32-bit for now. Does anyone have any experience with this or something similar?

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• Is there a Linux-compatible R/C simulator that works with real radios?

  - by Norman Ramsey

  My Dad flies radio-controlled (R/C) aircraft. He used to run a simulator called "RealFlight" which allowed him to connect his actual radio to his computer and fly simulated craft. He learned enough to fly actual planes, but he wants to move up from "trainer" aircraft to higher-performance craft. After some crashes, he'd like to go back to the simulator for a while. The catch: he's given up Windows and is now running Ubuntu. Question: is there an R/C flight simulator that Runs on Ubuntu? Allows you to connect your radio and use it to control the simulator, preferably through a USB port?

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• ATI video cards - unable to use entire monitor (1080p)

  - by Walter White

  Hi all, I have a Dell s2409w, 24" 1080p monitor. With nVidia, I would plug-in the monitor and voila, it automatically knew it was 1080p (1920x1080). I have both a Windows laptop and Ubuntu laptop. Neither is capable of using the fullscreen even though the monitor reports the input is 1080p. I am connecting the monitors via HDMI, is there a 'special' setting I am missing to make this work? Otherwise, I like the performance of my ATI video cards, the drivers seem to be stable and reliable. Thanks, Walter

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• Overcrowded Windows XP Folders

  - by BlairHippo

  I know that, technically, an individual Windows XP directory can hold an immense number of files (over 4.29 billion, according to a quick Google search). However, is there a practical ceiling where too many files in one directory starts having an impact on reads to those files? If so, what factors would exacerbate or help the issue? I ask because my employer has several hundred XP machines in the field at client sites, and the performance on some of the older ones is getting "sludgy." The machines download and display client-defined images, and my supervisor and I suspect that our slacktastic approach to cache management could be to blame. (Some of the directories have tens of thousands of images in them.) I'm trying to gather evidence to support or contest the theory before spending time on a coding fix.

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• Snow Leopard: Optimization

  - by Shyam

  Hi, I have bunch of questions: I have a Mac network, which has five Mac's. Right now, they are individually getting software updates. Is there a way to download the patches/security updates in a single place (repository) and point all machines to this location? Personally, I have tools like Monolingual and Onyx, but are there tools you could recommend that affect the performance of the Operating System positively? Tweaks would be nice. Links and pointers, would be really appreciated. I've read about Time machine, is there a way to backup all machines to a network drive using this tool? Thanks!

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• Optimal Memory Configuration for Dell PowerEdge 1800 (Windows Server 2000 32bit)

  - by David Murdoch

  I am upgrading the memory on a Dell PowerEdge 1800 Server running Windows Server 2000 (32 bit). My Computer Properties currently reports "2,096,432 KB RAM" (4 modules @ 512MB each). Crucial.com scan reports: "Each memory slot can hold DDR2 PC2-5300 with a maximum of 2GB per slot. Maximum Memory Capacity:  12288MB Currently Installed Memory:  2GB Available Memory Slots:  2 Total Memory Slots:  6 Dual Channel Support:   No CPU Manufacturer:  GenuineIntel CPU Family:  Intel(R) Xeon(TM) CPU 2.80GHz Model 4, Stepping 1 CPU Speed:  2793 MHz Installed in pairs of modules." We will be completely replacing the old 512 MB modules. Will there be any performance difference between installing 4 modules @ 1GB vs. 2 modules @ 2GB?

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• Kernel config file generator

  - by lisak

  Hey guys, could please anybody recommend some kind of kconfig generator that would trim modules and built-in stuff that is not needed according to current hardware ? The best I have found is this : http://lkml.org/lkml/2008/9/16/290 I don't care about compilation time and the amount of modules that are not built-in. I'm concerned about performance. I don't know how much memory and runtime is wasted on huge kernels with almost everything possible. I'm a java developer and I don't know what most of the modules and drivers are for. So there is not much I can disable and be sure that I don't screw it up. Thanks in advance

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• What is the difference between sar -B verses sar -W

  - by Mark

  I am trying to understand why my system is running slowly. I found the sar command, but wanted to know the difference between sar -B and sar -W I read the man page, and I understand that -B gives me the paging statistics and -W gives me the swapping statistics. What I would like to understand is the following: What is the correlation between the two sets of statistics. When should I be concerned about -B and when about -W? ie, what values from each command should I be concerned with? Which statistic is more closely related to system performance Thanks

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• Ubuntu 9.10 x86_32 with PAE causes graphics issues, mainly slowness

  - by widgisoft

  I've tried the 64bit version and found I was constantly hitting a brick wall trying to get 32bit stuff to run; I'd previously used PAE on 9.04 without any issues so figured I'd give it a shot. However, on 9.10 it seems PAE or the process of enabling PAE breaks the nvidia drivers/module somewhat as performance is terrible; I can't even enable desktop effects and there's lots of artifacting on random controls. Disabling the pae image and rebooting fixes the issue however I'm then stuck with "only" 2.7Gb of ram and unable to use the full 8gb that's installed. Is there somthing special I need to do when using pae and nVidia drivers or should I be using 64bit and just figure out how to force run 32bit packages? :-p

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• Achieving/maxing out 1GBPS connectivity on a nginx server

  - by Ansell Cruz

  This page (http://www.remsys.com/nginx-on-1gbps) claims that it can max out a 1gbps line using JBOD setup and no raid. Currently I'm on a 1gbps dedicated port and I'm on raid 10 (4x2TB - the disks that comes with 100tb.com servers). Currently I'm only peaking at 500-550mbps. wa% would show something around 20% everytime. I'm looking into maxing out this 1gbps port because I have an unmetered service from them. Do you guys think that the page that I referenced would be better than my current raid setup? Do you guys have any other suggestions on how to max out the performance of this server? TYI.

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• What's the best external hard drive configuration for a software developer laptop?

  - by Dan

  I've got a Dell laptop that I use as a software developer box at work and find that the drive is usually the bottleneck. I'd like to hook up two 10k RPM drives that are striped for performance. I've looked for drive cases with RAID but there don't seem to be very many choices and I'm worried about compatibility with the drives (preferably SATA 2). Also I don't have a SATA connection on my machine so it'll have to USB 2.0 for now. Am I headed down the right path or am I missing a much simpler configuration?

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• Buying Dual Monitors of different size and resolution

  - by rutherford

  I'm about to go choose a dual monitor setup: 1) Is there any reason why I can't just walk out and buy the two TFT screens I like (a wide screen and a 'portrait' screen) and combine them? Mainly wide screen would be for gaming, and portrait for browsing. I'd want the desktop stretching from one to the other (ie drag pointer, apps from one screen to the other) 2) Also do I need separate gfx cards for each monitor or can one cover both? any performance cost? 3) And can I have separate background images for each, seeing as they'll be different resolutions?

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• How to make IIS7 stop adding etag to response headers?

  - by user20028

  For performance reasons, I'm using expire headers for static files (adding long expiration periods like 50 years or so). Now I'm trying to get rid of etag headers which are automatically added by IIS7. I've done some searching but it seems harder than what I thought (there doesn't seem to be a straight forward way). I found some workarounds but they all use httpmodules (which I'm keeping as a last resort). I strongly prefer to not get the etag header added in the first place. Did anyone manage to do this? Thanks

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• Website content hosted with Google. Good or bad?

  - by user305052

  I recently decided to host my styles.css and various scripts on Google Docs and link them into my website. I also have all my images hosted through Picasa so that they too will load much faster and consistently across users. My site has most of its traffic from Japan, Africa, and South America, so I assume there will be a performance boost for my users since my server is hosted in Hong Kong. I (in Canada) have measured my load times to be half of what they used to be. Basically it's a free CDN for my personal stuff. I'm not too sure about all of this yet, so here's my question: what are the caveats of this setup? EDIT: So after rummaging through the ToS of both Picasa and Docs, there doesn't seem to be anything wrong with this kind of use.

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• What software can I use to pinpoint why Windows Server 2003 takes 15 seconds for any operation?

  - by Dr. Zim

  Ram is about 1/2 in use, four CPUs are all but idle. I tried "Microsoft Server Performance Advisor" with no luck. No entries in the Event Log for hardware failures, etc. And yet I can click on the start menu and wait 15 seconds for any new attempt. Launching software takes 30 seconds to respond. The server has an 8 drive WD RE 250 gig each Dell Perc 6 Sata raid array with Intel gigabit network cards. Anyone have any software titles that could analyze what is going wrong with this server?

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