Re: [squid-users] Increasing File Descriptors - Fixed!!

Hi!

Just one thought here:

I believe there is a limit on the number of connections that can be
originated from a single IP (IPv4), so, I guess that you have
*several* external IPs and that you make squid use many of them, look
that file on your system:

cat /proc/sys/net/ipv4/ip_local_port_range

in my PC it is: 32768 to 61000, thus giving me a max of 28232 outgoing
connections per IP, that's usually "enough", but your case isn't a
"usual" one.

I hope this helps,

Ildefonso Camargo

On Fri, May 7, 2010 at 8:32 AM, Bradley, Stephen W. Mr.
<bradlesw_at_muohio.edu> wrote:
> 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_at_usa.net]
> Sent: Thursday, May 06, 2010 4:15 PM
> To: Squid Users
> Subject: Re: [squid-users] 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_at_gmail.com> 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_at_muohio.edu> 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_at_gmail.com]
>> > Sent: Thursday, May 06, 2010 5:17 AM
>> > To: Bradley, Stephen W. Mr.
>> > Cc: squid-users_at_squid-cache.org
>> > Subject: Re: [squid-users] 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_at_muohio.edu> 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_at_gmail.com
>>
>
Received on Sat May 08 2010 - 19:17:33 MDT