Re: [squid-users] increasing file descriptors in Ubuntu 10.04/2.7.STABLE9

On 6/12/2011 7:54 p.m., Sean Boran wrote:
> Hi,
>
> On squid proxy using the stock Ubuntu squid packages, the file
> descriptors need to be increased.
>
> I found two suggestions:
> http://chrischan.blog-city.com/ubuntu_804_lts_increasing_squid_file_descriptors.htm
> but ulimit -n was still 1024 after rebooting.
> (and it also talks about recompiling squid with
> --with-filedescriptors=8192, but Id prefer to keep the stock ubuntu
> package if possible).
>
> This link:
> http://www.cyberciti.biz/faq/squid-proxy-server-running-out-filedescriptors/
> suggests alternative settings in /etc/security/limits.conf
> but "ulimit -a | grep 'open files'" still says 1024
>
> There was also a suggestion found to set a value in
> /proc/sys/fs/file-max, but the current value was already 392877
>
> Finally, the second article suggests (for red hat) just setting
> max_filedesc 4096
> in squid.conf
> and this actually works, i.e.
> "squidclient -p 80 mgr:info | grep 'file descri'"
> reports 4096
>
> So my question: is the squid.conf sufficent? How is the squid setting
> related to ulimit, if at all?

They are related. ulimit sets the OS limits squid can use,
max_filedescriptors (with its alias for RHEL) sets how many Squid tries
to use.
When Squid is run as root or with the right libcap security privileges
it should not need the ulimit, but if in doubt it wont hurt.

Amos
Received on Tue Dec 06 2011 - 10:00:00 MST