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• My Graphics Card isn't working Properly

  - by Dan

  I have just upgraded from a Sapphire AMD 6670 2gb Graphics card to a Nvidia GTX 650 ti 2gb SSC and my Windows Experiance index has gone from 6.8 to 7.7 but when playing games i am seeing no improvements i cannot play saints row three on even the lowest settings but according to many people and benchmarks on the web i should be able to play it comfortably. I want to know why this is happening to me..... I have installed the latest drivers and i have direct 10 + 11 installed I am 15 and it's my birthday today as i got it as a present but its not doing what i want also in am using a dvi cable not hdmi because i need a new one and its in the post. Is it possible that using dvi will affect performance

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• Staggering java linux process startup to prevent OOM

  - by ctennis

  I am running a number of java processes on a single Linux machine. From a memory and computing standpoint, everything is fine when things are static. However, periodically we use a configuration management package up upgrade the jar or war files, and restart the java process. The problem is, that is restarts them all relatively quickly, and so we get 10 or so java VMs restarting all at the same time (we use daemontools for the service stops/starts), which wreaks havoc on the machine, in terms of OOMs or just really slow. This is because it's spawning the JVM 10x at the same time. Other than trying to stagger the startups, is there a smarter way of handling this? Maybe a sysctl tuning performance parameters, or a JVM parameter?

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• What happens when you add a Graphics card to a i7 with build in graphics (e.g. HD 4000)

  - by Matt

  I'm thinking of upgrading my computer from an AMD Phenom II X4 955BE with a AMD Radeon HD 6800 Graphics card (not integrated) to using a Intel Core i7 3770. As I have no knowledge of integrated graphics, my question is, what happens to the computing power when not using the HD4000 integrated graphics of the CPU (does it mean the CPU will run faster then it would if I relied on it?) Also what is better the CPUs inbuilt HD4000 or my Radeon Graphics card? I am mostly interested in terms of content creation: Using Adobe After Effects, 3D Rendering etc. Not too bothered about gaming performance. I will be using the spare parts of this build and older systems to make a second computer for network renders so what will be the advantages of keeping the Radeon with the current system for that?

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• How to check if redis master is OK?

  - by e-satis

  On the documentation, they advice the monitor command. But it has a 50% performance penalty for the whole system, and how should I do that ? Whatching the ouput using SSH until I don't see anything ? Let's say I have 3 servers: 1 with a redis master, 1 with a redis slave, and one with my website querying the redis master. How can I, from my website server, make cleany the decision to fallback to the slave by sending the SLAVEOF NO ONE command ? My first step would be to put some kind of timeout check with a simple ping, just to be sure the server is online. But for redis specifically, I have no clue.

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• Dell EqualLogic vs. EMC VNXe [closed]

  - by Untalented

  We've been looking into SMB SANs and based on the competitive pricing I've been getting we're really liking these two array's. There are some pro's to both solutions, but I've unable to really decide which to choose. The EMC offers better expandability since you can buy an additional shelf (roughly $1200) and can add drives then to the array. However, the Dell unit is still very nice. Can anyone comment on their experiences with the two and thoughts on this? Also, to get the VMware Storage API support you need VMware Enterprise. How much additional performance does this provide? It's roughly $15k more than the Essentials Plus bundle we're looking at (this is a small environment [3 Hosts 1 Array].

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• sonicwall nsa 240

  - by Adam

  Hi We are looking into putting a hardware firewall into a data center to protect our rack of servers. We are using the servers for terminal services and we have 2 x 1GB connections to the Internet. We have about 50 servers supporting about 250 users which will grow very soon to 500 users. We plan to purchase 2 hardware firewalls to provide HA. Do you think the Sonicwall NSA 240 with Total Secure is a good match for this in terms of performance and protection (from spyware, virus etc?) or is there a better purchase? (Maybe a Watchguard X5 or X8?)

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• Where should I go to learn about networking? [closed]

  - by Ollie Saunders

  I wonder if anyone could recommend resource or resources such as a good book that: explains how all the important protocols work and interact. I’m interested in those that are relevant in a typical home network and used over the Internet explains in detail how ADSL Internet connections work to the level of depth necessary so that I’m able to tweak and measure performance settings starts from the beginning but attempts to provide proper understanding rather than idiot-oriented steps to follow Basically, I’m interested in how these technologies work and tend to be implemented in hardware and software rather than “here’s what to do if…” I’m interested in Computer Networking by Andrew S. Tanenbaum and I wonder if anyone else has any experience with that title. It’s expensive but I could probably loan a copy for £3 from the library or so.

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• Routing Essentials

  - by zharvey

  I'm a programmer trying to fill a big hole in my understanding of networking basics. I've been reading a good book (Networking Bible by Sosinki) but I have been finding that there is a lot of "assumed" information contained, where terms/concepts are thrown at the reader without a proper introduction to them. I understand that a "route" is a path through a network. But I am struggling with visualizing some routing-based concepts. Namely: How do routes actually manifest themselves in the hardware? Are they just a list of IP addresses that get computed at the network layer, and then executed by the transport? What kind of data exists in a so-caleld routing table? Is a routing-table just the mechanism for holding these lists of IP address (read above)? What are the performance pros/cons for having a static route, as opposed to a dynamic route?

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• Prevent Windows 7 from unpluging External HDD

  - by marverix

  I have installed Windows 7 as my media server. I pluged in 500GB external HDD via USB. I have changed power plan to Best Performance and changed advenced power settings to never turn off HDD etc. I even yesterday wrote powershell script (create and delete folder on this disk) and I have added it to harmonogram to run every 5 minutes starting from system boot. And nothing! Disk after some time (I realy can't say when) is turning off and Windows show "Unknown Device" in Device Manager. Then only system reboot or disk reboot helps. Any ideas how to prevent Windows 7 from stopping my external HDD? Cheers!

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• Make SoX not show output

  - by Ram Rachum

  I'm recording with SoX, and I want to make it not show output at all. When recording, it shows this output: Input File : 'default' (waveaudio) Channels : 2 Sample Rate : 48000 Precision : 16-bit Sample Encoding: 16-bit Signed Integer PCM In:0.00% 00:00:00.68 [00:00:00.00] Out:28.7k [ | ] Clip:0 I tried setting verbosity to 0, but it has no effect. (I'm guessing it's meant for messages other than this.) I don't just want to hide the output, which I could do easily; I want SoX to not generate it in the first place, for performance on a weak computer.

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• What does advantages of WIM image that file based vs. ISO or another sector based images in Administrator

  - by saber tabatabaee yazdi

  answers of this question is very important to administrators to choose between Microsoft solution or other 3rd Party Tools. WIM solution is file based and others are sector by sector images like Acronis or other backup and clone tools like Norton Ghost or Cloning in vmware ESXi and etc. My question about the advantages of WIM to edit or deploy in Enterprise? to get agreements of managers to choose between these alternative decisions. Are we had any Key Performance Indicators in Change management? Are there any statistics about compares of these solutions? What Time is spend in any solotion to get image or change images or revert and apply images? Is it possible to change and modify images that made in All of these solutions as easy as in WIM file?

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• Timeouts when connecting to SQL Server since installing SP1 for Windows 7

  - by Julien

  Hi, I just installed SP1 for windows 7 and I have severe performance degradation when connecting to SQL Server 2005 since then. Establishing connection takes more than 30 seconds while it's instantaneous on another computer. Firewall is disabled and I didn't make any change to the configuration. It happens both when trying to connect with a hostname and with an ip address. Everything else seems to be fine (for instance, I'm have no issue connecting to other computers with remote desktop) What can cause such a problem? Thanks in advance! Edit : uninstalling the SP1 solves the issue instantly.

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• Which VNC for Mac to WinXP Home control?

  - by IVR Avenger

  Hi, all. I've got a MacBook and a Windows XP Home machine. I'd like to be able to connect into the XP machine from the Mac over VNC, but not through the Web method, where performance seems to be a bit iffy. I've done some research, and it seems everyone is interested in the XP-Mac connection, where I'm looking to go in the other direction. Is there a free VNC Server out there that will let me accomplish this? Thanks! IVR Avenger

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• Open Source Visualization and Dashboard Software

  - by helios

  I am working on an open source Application Performance Monitoring (APM) software and looking for a visualization tool with dashboard capabilities. I came across Graphite which looks pretty good but wondering if there is anything better out there before I settle down with that tool. Here's the list of features I am interested in: Must-Have Open Source license API to submit real time data Web-based visualization interface Persistence - file or database Nice-To-Have Dashboard Capabilities: Allow users to select a few metrics (CPU, Heap Usage, # of Active Users etc.) and place them on a single page for easier monitoring. Any suggestions?

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• How can I compare effective power usage of two CPUs / CPU+Mobo+Mem combinations?

  - by einpoklum

  I have this server which does mostly file sharing (with the associated storage). No serious number crunching and it isn't the firewall. My current box has a Celeron D processor (Prescott 336 2.8 GHz); and I'm considering replacing it with a Pentium D (Smithfield 805 2.66 GHz) - for reasons which do not involve performance. How can I know whether one can expect a higher or lower power consumptipn for the change? And how can I estimate the power consumption for each option?

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• Upgrading from MySQL Server to MariaDB

  - by Korrupzion

  I've heard that MariaDB has better performance than MySQL-Server. I'm running software that makes an intensive use of MySQL, thats why I want to try upgrading to MariaDB. Please tell me your experiences doing this conversion, and instructions or tips. Also, which files I should take care of for making a backup of MySQL-Server, so if something goes wrong with MariaDB, I could rollback to MySQL without issues? I would use this but i'm not sure if it's enough to get a full backup of MySQL-Server confs and databases mysqldump --all-databases backup /etc/mysql My Environment: uname -a (Debian Lenny) Linux charizard 2.6.26-2-amd64 #1 SMP Thu Sep 16 15:56:38 UTC 2010 x86_64 GNU/Linux MySQL Server Version: Server version 5.0.51a-24+lenny4 MySQL Client: 5.0.51a Statistics: Threads: 25 Questions: 14690861 Slow queries: 9 Opens: 21428 Flush tables: 1 Open tables: 128 Queries per second avg: 162.666 Uptime: 1 day 1 hour 5 min 13 sec Thanks! PS: Rate my english :D

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• Older raid controllers in raid 5 vs. Jbod and SW raid

  - by TEB

  Hi. Im in the fortunate position to have 6 Supermicro older VOD servers with the following config: Supermicro 3U case, 3xPSU Dual Xeon 3ghz P4 class cpu (5 years old.. havnt checked the exact type) 4GB Ram 3ware 9500-8 SATA controller 8 SATA SLOTS and alot of free drives. 2GB FLASH Bootdrive What im curious about is the RAID5 performance on these old beasts in HW mode vs. SW on Linux with the controller set in JBOD mode. Im thinking on using Centos 5.5 or Ubuntu or ZFS RaidZ on Opensolaris. Any tips? or reccomendations ? best regards TEB

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• Few questions about SLI

  - by toomanyairmiles

  Hi all, thanks in advance for your help. I've just added a second card to my system so I can add a third monitor. I'd got as far as determining both cards need to use the same driver (after a blind alley with another cheap ATi card) so I'm now the proud owner of a second BFG 9800 GTX+ card. One is a BFG OCX and the other an BFG OC (small difference in clock speeds but they are in all other respects the same) but wanted to know the following:- 1) Is it worth adding the SLI connector, will it really boost overall performance (I'm guessing that the OCX card will then perform as the OC card does)? 2) Are SLI connectors (the one's that run across the top of the cards) motherboard or manufacturer specific? 3) If I do SLI the cards will I still be able to use all four monitor connectors or just the two on the master card? I'm not a gamer, I'm an IA and web designer so the system is mostly for Photoshop and Illustrator work and the occasional knock around in command and conquer.

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• What settings to use for fastest reloading of a MySQL backup?

  - by Alex R

  I have a MySQL database which dumps to a 3.5 GB backup (mysqldump) in about 10 minutes. But reloading this backup on a standby / test server takes upwards of 12 hours. What are some settings that would maximize reloading performance? The most promising appear to be innodb_buffer_pool_size, innodb_additional_mem_pool_size, and innodb_log_buffer_size... but I'm reaching the limits of my trial-and-error approach. Which of these settings "should" be the most important? Through trial-and-error I was not able to get more than 70% CPU utilization and 63% memory utilization. I'd like both at 100% during a reload. All tables are InnoDB.

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• concrete uses of LDAP?

  - by ajsie

  im new to LDAP. i wonder what are some concrete examples of using LDAP. things that are MUCH more easier to do when you got 3-7 linux computers in a small company network. one use that is very important for me seems to be that you configure LDAP to handle system authentication. then you dont have to create same accounts in all computers. are there other things that are a MUST DO for a small network to save more time? my small network is for apache servers and database servers. and should LDAP be in an own machine? cause i guess its not good to put it in apache or database servers since these are performance dependent.

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• Using Google's App Engine as CDN for static files

  - by Saif Bechan

  I am planning on moving my static files to Google's App Engine. I was wondering if this is a good idea to do. I have read that is it possible that Google will cache your files on multiple locations, which is a good thing in my opinion. The setup should also be quite easy in eclipse with the GAE plugins. But i still have my doubts on the performance of this. Is the setup of App Engine optimized for serving static content. Now I have Nginx server my static content, will App Engine perform the same way. Are there any other ups or downs using this method?

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• Nexenta under KVM?

  - by Nick

  I have an Ubuntu Server running KVM. I'd like to get the benefits of ZFS so I was thinking of installing a virtual machine under KVM running Nexenta (or NexentaStor), allowing that virtual machine to have raw access to a couple of physical hard disks, and then having it share its file system with NFS so that Ubuntu can access it. I've never tried setting up KVM so that the virtual machine has access to physical drives. Does this sound feasible, and is there anything I need to watch out for? Has someone already documented something like this? Does Nexenta/ZFS function basically as well in the virtual environment as if they were running base bones? I can take a small performance hit, but I don't want it to not be as reliable because of the virtualization. Thanks.

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• cygwin rsync over ssh very slow

  - by Waleed Hamra

  I have 2 machines running Windows Xp SP3. I have cygwin installed on both, version 1.7. I have rsync and ssh installed on both, and configured using default settings as per ssh-host-config and ssh-user-config programs provided. I moved the public keys into their respective locations, and basically ssh is working fine. i began an rsync operation, using: rsync -av --delete --hard-links local_dir username@other_machine:/some_dir well... on both machines, the processor is running near idle, no heavy usage. I checked IO using process explorer on both machines, and that too is at normal levels (1~2 MB/s), so I can't see where the bottlenecks are, because network performance is aweful. I'm not going over 1MB/s... when a normal file copy using windows sharing achieves some ~10 MB/s.. What could be wrong?

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• Restricting permissions to individual documents on SharePoint

  - by wahle509

  Here's what I'm trying to do: I would like to create a list of documents on a site in my company's SharePoint site. Each document should have specific user's permissions to view and edit it. For example: The list is for performance reports. John has his out there called "John_PR_09.docx". Only him and his supervisor should have permissions to view, edit, or do anything to it. And then another employee has hers out there with permissions for only her and her supervisor, and so on... I have tested this out with a document that I removed the groups and users from (since they inherit permissions from it's parent) and only gave my user account permissions to. I then asked someone else to try and open and she could, she even wrote "TEST" on the document and saved it. What am I doing wrong? I thought I stopped it from inheriting permissions from it's parent and only gave myself rights to edit it.

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• critical swap nagios

  - by Toby Joiner

  I installed nagios a very long time ago, and have started trying to use it now. I am getting this error: Current Status: CRITICAL (for 231d 16h 52m 49s) Status Information: SWAP CRITICAL - 100% free (0 MB out of 0 MB) Performance Data: swap=0MB;0;0;0;0 Current Attempt: 4/4 (HARD state) Last Check Time: 01-09-2011 13:26:34 Check Type: ACTIVE Check Latency / Duration: 0.125 / 0.004 seconds Next Scheduled Check: 01-09-2011 13:31:34 Last State Change: 05-22-2010 21:36:47 Last Notification: 01-09-2011 13:01:42 (notification 5521) Is This Service Flapping? NO (0.00% state change) In Scheduled Downtime? NO Last Update: 01-09-2011 13:29:32 ( 0d 0h 0m 4s ago) Is this normal? Should I be concerned? If more info is needed please let me know.

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