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  • How to tell if PAE is hurting me?

    - by James
    I have a couple of servers with 20-30 GB RAM that are running (a variant of) RHEL4. They are currently running the SMP i386 kernel, not x64, not even the hugemem kernel. This means LowMem is confined to < 1G, and thus dentry_cache and ext3_inode_cache to 100M or so each. How can I tell if this is a problem? Here's a typical vmstat report while it's compiling some Java: $ vmstat 10 procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 1 1 0 19493816 394740 922420 0 0 1058 2292 1491 1020 6 3 80 12 2 1 0 19519480 395244 850156 0 0 1179 1412 1329 1195 9 4 75 12 1 1 0 19557368 392616 828344 0 0 1783 1680 1498 1756 14 5 72 9 I don't like the way bi is nonzero when there is so much memory free. I imagine slabtop could point more directly to the problem but I don't really understand how to interpret its output.

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  • YouTube videos not working

    - by André
    I have a problem with watching YouTube videos. It says: "An error occurred, please try again later". I've tried loading different videos and that's what it says to all the videos I try to watch. I've tried using another browser, clearing cache + cookies etc, but none of that really worked out. My operating system is Windows 7 Home Premium, I use Google Chrome as my browser. And the YouTube videos was able to be watched earlier. I suspect that it has something to do with the PC, since I've got YouTube working on my laptop earlier. Not sure if it still works on my laptop though. Hope I've given enough information for you to help me out with this problem. Feel free to ask if there's anything else you need to know. Hope you can/will help me out. :)

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  • Apache Sending "Content-Length : 0" , How to Fix ?

    - by ServerZilla
    Hi, I am using Apache server and it is sending Content-Length = 0 value which is preventing file-downloads, see - http://www.youtubedroid.com/download2.php?v=%5F3XcMEKNws0&title=Akhila+%2CMumbai+reloaded%2CSuper+dancer+2&hq=0 , here are my .htaccess content : SetEnv no-gzip dont-vary Here are headers sent by the server : HTTP/1.1 200 OK Date: Tue, 15 Dec 2009 06:12:11 GMT Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8e-fips-rhel5 mod_bwlimited/1.4 X-Powered-By: PHP/5.2.11 Content-Description: File Transfer Content-Disposition: attachment; filename="Akhila ,Mumbai reloaded,Super dancer 2.mp3" Content-Transfer-Encoding: binary Expires: 0 Cache-Control: must-revalidate, post-check=0, pre-check=0 Pragma: public X-Sendfile: ./tmp/64eb3b185e38af95c15405ffb0606e76.mp3 Content-Length: 0 Keep-Alive: timeout=5, max=95 Connection: Keep-Alive Content-Type: application/octet-stream Pls. tell how to fix this ?

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  • convert .htaccess to nginx

    - by Chip Gà Con
    It's me again :( I was trying to install siwapp on my webserver but I couldn't make it work with nginx, here is the .htaccess file content: RewriteCond %{REQUEST_FILENAME} !index.php RewriteRule (.*)\.php$ index.php/$1 RewriteCond $1 !^(index\.php|nhototamsu|assets|cache|xd_receiver\.html|photo|ipanel|automap|xajax_js|files|robots\.txt|favicon\.ico|ione\.ico|(.*)\.xml|ror\.xml|tool|google6afb981101589049\.html|googlec0d38cf2adbc25bc\.html|widget|iradio_admin|services|wsdl) RewriteRule ^(.*)$ index.php/$1 [QSA,L] When I access http://myurl.com/tin-tuc/tuyen-sinh/tu-van/2012/04/25757-phan-van-qua-giua-khoi-a1-va-khoi-a.html ,nginx could display the page correctly, it said: "404 Not Found" (new URL: http://myurl.com/tin-tuc/tuyen-sinh/tu-van/2012/04/25757-phan-van-qua-giua-khoi-a1-va-khoi-a.html)

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  • How can I exceed the 60% Memory Limit of IIS7

    - by evilknot
    Pardon if this is more stackoverflow vs. serverfault. It seems to be on the border. We have an application that caches a large amount of product data for an e-commerce application using ASP.NET caching. This is a dictionary object with 65K elements, and our calculations put the object's size at ~10GB. Problem: The amount of memory the object consumes seems to be far in excess of our 10GB calculation. BIGGEST CONCERN: We can't seem to use over 60% of the 32GB in the server. What we've tried so far: In machine.config/system.web (sf doesn't allow the tags, pardon the formatting): processModel autoConfig="true" memoryLimit="80" In web.config/system.web/caching/cache (sf doesn't allow the tags, pardon the formatting): privateBytesLimit = "20000000000" (and 0, the default of course) percentagePhysicalMemoryUsedLimit = "90" Environment: Windows 2008R2 x64 32GB RAM IIS7 Nothing seems to allow us to exceed the 60% value. See attached screenshot of taskman.

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  • Raid0 performance degradation?

    - by davy8
    Not sure if this belongs here or on SuperUser, feel free to move as appropriate. I've noticed the performance on my RAID0 setup seems to have degraded over the past months. The throughput is fine, but I think the random access time has increased or something. In use I generally see about 1-5mb/sec when loading stuff in Visual Studio and other apps and it doesn't seem like the CPU is bottlenecking as the CPU utilization is pretty low. I don't recall what Access Time used to be, but HD Tune is reporting 12.6ms Read throughput is showing as averaging about 125MB/sec so it should be great for sequential reads. Defrag daily and it shows fragmentation levels low, so that shouldn't be an issue. Additional info, Windows 7 x64, Intel raid controller on mobo, WD Black 500GB (I think 32mb cache) x2.

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  • Raid0 performance degradation?

    - by davy8
    Not sure if this belongs here or on SuperUser, feel free to move as appropriate. I've noticed the performance on my RAID0 setup seems to have degraded over the past months. The throughput is fine, but I think the random access time has increased or something. In use I generally see about 1-5mb/sec when loading stuff in Visual Studio and other apps and it doesn't seem like the CPU is bottlenecking as the CPU utilization is pretty low. I don't recall what Access Time used to be, but HD Tune is reporting 12.6ms Read throughput is showing as averaging about 125MB/sec so it should be great for sequential reads. Defrag daily and it shows fragmentation levels low, so that shouldn't be an issue. Additional info, Windows 7 x64, Intel raid controller on mobo, WD Black 500GB (I think 32mb cache) x2.

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  • How to using Mono for windows to Access WMI to get hardware Id?

    - by guaike
    Hi, folks Recently,I need run my winforms App on mono for windows platform,But i am using WMI to get MAC address and CPU ID in my original code,switch to Mono for Windows,it does not working. I found that "System.Management.dll" APIs is not implemented in Mono. How can i do?How to get CPU ID,MAC Address, Hard Disk Serial Number,and Motherboard Serial Number with out WMI?

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  • Varnish Error 503 Service Unavailable

    - by alfish
    On Debian I have Varnish cache in front of apache and get 503 error when I try to get urls which are rarely fetched. I've put 10 min timeout in default.vlc: backend default { .host = "127.0.0.1"; .port = "81"; .connect_timeout = 600s; .first_byte_timeout = 600s; .between_bytes_timeout = 600s; } Also I have in /etc/default/varnish DAEMON_OPTS="-a :80 \ -T localhost:6082 \ -b localhost:81 \ -u varnish -g varnish \ -S /etc/varnish/secret \ -p thread_pools=7 \ -p thread_pool_min=200 \ -p thread_pool_max=5000 \ -p listen_depth=2048 \ -p thread_pool_add_delay=2\ -p lru_interval=1800 \ -h classic,169313 \ -p session_linger=100 \ -p sess_workspace=262144 \ -p connect_timeout=600 \ -p max_restarts=6 \ -s malloc,7G" I appreciate your hints to resove this problem.

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  • Chrome shows "The site's security certificate is not trusted" error

    - by Emerald214
    From this morning I get this error whenever I access Google Docs and some websites. My system datetime is correct and I checked "Automatically from the Internet". My BIOS is OK. I cleared everything (cache, cookie, private data) in Chrome and restarted OS but nothing changes. How to fix it? Firefox works but Chrome has that problem. The site's security certificate is not trusted! You attempted to reach docs.google.com, but the server presented a certificate issued by an entity that is not trusted by your computer's operating system. This may mean that the server has generated its own security credentials, which Google Chrome cannot rely on for identity information, or an attacker may be trying to intercept your communications. You cannot proceed because the website operator has requested heightened security for this domain.

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  • BIND - zone not loaded du to errors

    - by Johan Barelds
    After upgrading from Ubuntu 8.04 to 10.04 my DNS isn't working properly anymore. I keep getting this error when I run named-checkzone example.com /var/cache/bind/example.com.zone.db zone example.com/IN: NS 'mx002a.example.com' has no address records (A or AAAA) zone example.com/IN: not loaded due to errors. in /var/cached/bind/example.com.db $TTL 3D @ IN SOA mx002a.example.com. chantra.example.com. ( 200608081 ; serial, todays date + todays serial # 8H ; refresh, seconds 2H ; retry, seconds 4W ; expire, seconds 1D ) ; minimum, seconds ; ; mx002a.example.com IN A 192.168.85.19 example.com. IN NS mx002a.example.com. mx001 60 IN A 192.168.85.17 mx001 60 IN A 192.168.85.18

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  • Mac App Store Reviewer says "It appears Kiwi fails codesign verification"

    - by isaiah
    But it clearly does not fail on my system. The Verification test in XCode during the submission should (I assume) test this. And running codesign on the command line of the archived app results in: /Users/iac/Library/Application Support/Developer/Shared/Archived Applications/272860A0-961E-47E7-B62F-0F7D373D938A.apparchive/Kiwi.app: valid on disk /Users/iac/Library/Application Support/Developer/Shared/Archived Applications/272860A0-961E-47E7-B62F-0F7D373D938A.apparchive/Kiwi.app: satisfies its Designated Requirement Anyone run into something like this before? Thanks, Isaiah

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  • Reset Network Load Balancer Connection Pool

    - by bill_the_loser
    I am currently working on load testing a web application on a virtual machine cluster. I am looking for a way to flush the connection pool / NLB cache so that it is like each machine connecting to the NLB is connecting for the first time and doesn't get directed back to the node that it was on last time. This a Windows 2003 Server cluster, behind a Microsoft software based Network Load Balancer. Additional Information: To do the load testing I'm using virtual machines, one for each node on the cluster. Somehow I got two virtual machines connecting to the same node and I'm looking for an easier way to reset those connections without going in to the NLB Manager and stopping and starting each node on the NLB. Update: We went ahead and changed the affinity on all of the nodes of the cluster to none. Now it's a non-issue.

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  • Detect when application is running in a VM environment

    - by Malcolm
    Looking for ideas on how to detect when our Windows application is running in one of the following VM environments. Some starter ideas for detection are in parentheses. There may be (much) better detection techniques - the starter ideas I've come up with are based on my Google research. VMWare (looking for the presence of optional VMware Tools is one way) Microsoft Virtual PC (have a device named "Virtual HD" for their IDE disks, "MS Virtual SCSI Disk Device" for their SCSI disks) Citrix Xen Sun Virtual Box Thank you, Malcolm

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  • How to: mirror a staging server from a production server

    - by Zombies
    We want to mirror our current production app server (Oracle Application Server) onto our staging server. As it stands right now, various things are out of sync, and what may work in testing/QA can easily fail in production because of settings/patch/etc inconsistencies. I was thinking what would be best is to clone the entire disk daily and push it onto the staging server... Would this be the best method...?

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  • Wordpress Showing White Text [closed]

    - by Sakamoto Kazuma
    So I've heard about all the wordpress issues with plugins making the edit box show only white text. I've heard about how this is an issue and they're working to fix it. I think the issue I'm having is a bit different. I can see plain black clean nice readable editable text on most of the computers within my dept. However, one user is seeing the white text while using IE6. I've disabled and re-enabled all if his IE plugins including Gears and adobe. Still seeing the issue with just that one computer. I have run windows udpate, and cleared the cache, all cookies and cleaned up the registry. Still seeing white text. Checked user preferences, but noticed that any users using that computer to edit posts will see white text. Is there a fix or workaround?

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  • Django: Password protect photo url's?

    - by MikeN
    From my Django application I want to serve up secure photos. The photos are not for public consumption, I only want logged in users to have the ability to view them. I don't want to rely on obfuscated file id's (giving a photo a UUID of a long number) and count on that being hidden in my media folder. How would I store a photo securely on disk in my database and only stream it out to an authenticated session?

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  • HTTP Range request rejected

    - by Dan
    I am trying to understand why my production environment might be disallowing HTTP RANGE requests. I have a pool of W2K8x64/IIS7 servers behind a pair of Netscaler 9000s. I compose the following request in Fiddler: http://myorigin.example.com/file.flv User-Agent: Fiddler Host: myorigin.example.com Range: bytes=40000-60000 The response looks like: HTTP/1.1 200 OK Cache-Control: public Content-Type: video/x-flv Expires: Thu, 24 Jun 2010 18:23:53 GMT Last-Modified: Sat, 11 Apr 2009 00:16:14 GMT Accept-Ranges: none ETag: f9d5c718-e148-4225-9ca6-d1f91a2a3c08-_633749805744270000 Server: Microsoft-IIS/7.0 Edge-Control: max-age=2592000 X-Powered-By: ASP.NET Date: Tue, 25 May 2010 18:23:53 GMT Content-Length: 443668 "Accept-Ranges: none" tells me that the range request was rejected, but I am not sure where/why as IIS7 accepts Range by default. Could the 'scalers be shooting it down? Thanks, Dan

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  • Windows Live Mail treating my Firefox as mobile device

    - by Mussnoon
    I started using Namoroka (firefox 3.6 nighly) yesterday and since then, windows live mail has been treating it like a mobile device. Same thing happens when I try with Minefield (firefox 4 nightly). I've tried loading the default page in Chromium and then pasting the URL to firefox. The sign in page shows alright then, but as soon as I sign in, the mobile inbox shows up again. I've tried clearing the cache+history+cookies everything but nothing's working. Anyone know of a solution?

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  • Optimizing PHP<>MySQL performance

    - by BarsMonster
    I am trying to optimize my PHP<MySQL on this test script: <? for($i=0;$i<100;$i++)//Itterations count $res.= var_dump(loadRow("select body_ru from articles where id>$i*50 limit 100")); print_r($res); ?> I have APC, and article table have an index on id. Also, all these queries are hitting query cache, so sole MySQL performance if great. But when I am using ab -c 10 -t 10 to bench this scipt, I am getting: 100 itterations: ~100req/sec (~10'000 MySQL queries per second) 5 itteration: ~200req/sec 1 itteration: ~380req/sec 0 itteration: ~580req/sec I've tried to disable persistent connections in PHP - it made it slower a bit. So, how can I make it work faster, provided that MySQL is not limiting performance here?

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  • localhost still responses after uninstalling IIS Windows 7

    - by ryanzec
    I was experimenting with IIS and ASP.NET however I want to go back to WAMP as far as my development server stack on my local windows 7 computer. So I disabled the IIS windows program (using Control Panel - Program and Features - Turn Windows Features on or off) and installed WAMP. I then when to localhost in my browser and just got a blank page. I then uninstalled WAMP and tried again and still got the blank page. I cleared my browser all of saved data like cache and still the same effect. I have uninstalled IIS and WAMP however I can't get localhost to return server not found like it usually does. I know the skype can sometimes effect things running on port 80 so I quit that but still it does not work. Is there a way I can figure out what is running on the port and returning me an empty page?

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  • How to maximize http.sys file upload performance

    - by anelson
    I'm building a tool that transfers very large streaming data sets (possibly on the order of terabytes in a single stream; routinely in the tens of gigabytes) from one server to another. The client portion of the tool will read blocks from the source disk, and send them over the network. The server side will read these blocks off the network and write them to a file on the server disk. Right now I'm trying to decide which transport to use. Options are raw TCP, and HTTP. I really, REALLY want to be able to use HTTP. The HttpListener (or WCF if I want to go that route) make it easy to plug in to the HTTP Server API (http.sys), and I can get things like authentication and SSL for free. The problem right now is performance. I wrote a simple test harness that sends 128K blocks of NULL bytes using the BeginWrite/EndWrite async I/O idiom, with async BeginRead/EndRead on the server side. I've modified this test harness so I can do this with either HTTP PUT operations via HttpWebRequest/HttpListener, or plain old socket writes using TcpClient/TcpListener. To rule out issues with network cards or network pathways, both the client and server are on one machine and communicate over localhost. On my 12-core Windows 2008 R2 test server, the TCP version of this test harness can push bytes at 450MB/s, with minimal CPU usage. On the same box, the HTTP version of the test harness runs between 130MB/s and 200MB/s depending upon how I tweak it. In both cases CPU usage is low, and the vast majority of what CPU usage there is is kernel time, so I'm pretty sure my usage of C# and the .NET runtime is not the bottleneck. The box has two 6-core Xeon X5650 processors, 24GB of single-ranked DDR3 RAM, and is used exclusively by me for my own performance testing. I already know about HTTP client tweaks like ServicePointManager.MaxServicePointIdleTime, ServicePointManager.DefaultConnectionLimit, ServicePointManager.Expect100Continue, and HttpWebRequest.AllowWriteStreamBuffering. Does anyone have any ideas for how I can get HTTP.sys performance beyond 200MB/s? Has anyone seen it perform this well on any environment?

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