Got it resolved! cat /proc/sys/fs/file-max showed that I could go as high as 3,138,830 FDs. I changed the compile options to --with-maxfd=128000 and recompiled and installed it. I changed the line in my /etc/init.d/squid script to ulimit -HSn 128000 and restarted. I thought I had tried all this before but evidently not. If it almost held the load at 32,768 then at 128,000 I should have enough head room to keep us safe, for now. Thanks to all who responded. steve -----Original Message----- From: Nyamul Hassan [mailto:mnhassan@xxxxxxx] Sent: Thursday, May 06, 2010 4:15 PM To: Squid Users Subject: Re: Increasing File Descriptors He needs more FDs because this single box is handling 5000 users over a 400mbps connection. We run around 2,000 users on generic hardware, and have seen FDs as high as 20k. We use CentOS 5 and the following guide is a good place to increase the FD limit: http://www.cyberciti.biz/faq/linux-increase-the-maximum-number-of-open-files/ The command "cat /proc/sys/fs/file-max" shows how many maximum FDs your OS can handle. After you've made sure that your OS is doing your desired FD limit, please re-run Squid. Squid shows how many FDs it is configured for in its "General Runtime Information" (mgr:info in cli) from the CacheMgr interface. If this still shows lower than the OS limit you just saw earlier, then you might need to recompile Squid with the '--with-maxfd=<your-desired-fdmax>' flag set during "./configure" As a side note, if you are using Squid as a forward proxy, you might have better results with Squid 2.7x. Regards HASSAN On Fri, May 7, 2010 at 00:53, George Herbert <george.herbert@xxxxxxxxx> wrote: > > Do this: > > ulimit -Hn > > If the values is 32768 that's your current kernel/sys max value and > you're stuck. > > If it's more than 32768 (and my RHEL 5.3 box says 65536) then you > should be able to increase up to that value. Unless there's an > internal signed 16-bit int involved in FD tracking inside the Squid > code then something curious is happening... > > However - I'm curious as to why you'd need that many. I've had top > end systems with Squid clusters running with compiles of 16k file > descriptors and only ever really used 4-5k. What are you doing that > you need more than 32k? > > > -george > > On Thu, May 6, 2010 at 10:32 AM, Bradley, Stephen W. Mr. > <bradlesw@xxxxxxxxxx> wrote: > > Unfortunately won't work for me above 32768. > > > > I have the ulimit in the startup script and that works okay but I need more the 32768. > > > > :-( > > > > > > > > -----Original Message----- > > From: Ivan . [mailto:ivanhec@xxxxxxxxx] > > Sent: Thursday, May 06, 2010 5:17 AM > > To: Bradley, Stephen W. Mr. > > Cc: squid-users@xxxxxxxxxxxxxxx > > Subject: Re: Increasing File Descriptors > > > > worked for me > > > > http://paulgoscicki.com/archives/2007/01/squid-warning-your-cache-is-running-out-of-filedescriptors/ > > > > no recompile necessary > > > > > > On Thu, May 6, 2010 at 7:13 PM, Bradley, Stephen W. Mr. > > <bradlesw@xxxxxxxxxx> wrote: > >> I can't seem to get increase the number above 32768 no matter what I do. > >> > >> Ulimit during compile, sysctl.conf and everything else but no luck. > >> > >> > >> I have about 5,000 users on a 400mbit connection. > >> > >> Steve > >> > >> RHEL5 64bit with Squid 3.1.1 > > > > > > -- > -george william herbert > george.herbert@xxxxxxxxx >
