[squid-users] SQUID: cache_dir filling up and squid imploding

Nelson Manuel Marques nmm at eurotux.com
Tue Oct 13 14:05:05 UTC 2015

Hi all,

We have a squid running for quite a few years and with the increase of
traffic we noticed a bit of I/O hammering on the squid server (local

For some testing, I've made a small 1.2GB tmpfs and pointed cache_dir
to it so that our cache would be in the 'ramdrive'.

This did help a lot with I/O, but squid eventually once in a while
implodes when it fills 1.2GB of the ramdrive (cache_dir is configured
for 1G, leaving 200MB free).

This is on a CentOS based system:

[####EDIT#### squid]# rpm -qi squid
Name        : squid                        Relocations: (not
Version     : 3.1.23                            Vendor: CentOS
Release     : 9.el6                         Build Date: Fri 24 Jul 2015
09:59:03 AM WEST
Install Date: Tue 13 Oct 2015 02:31:20 PM WEST      Build Host:
Group       : System Environment/Daemons    Source RPM: squid-3.1.23
Size        : 6649558                          License: GPLv2 and
(LGPLv2+ and Public Domain)
Signature   : RSA/SHA1, Fri 24 Jul 2015 09:39:20 PM WEST, Key ID
Packager    : CentOS BuildSystem <http://bugs.centos.org>
URL         : http://www.squid-cache.org
Summary     : The Squid proxy caching server
Description :

Anyone can help? Imagine I want to keep working on a ramdrive with
1.5G. How much can I get cache_dir configured with a safe margin so it
doesnt fill the space?

Any options I should look over again which might help me diagnose if it
happens again?

Kindest Regards,

Nelson Manuel Marques <nmm at eurotux.com>
Administrador de Sistemas
Eurotux Informática S.A. | www.eurotux.com
(t) +351 253 680 300
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