Re: [squid-users] Repost: Squid 3.1.x uses considerably more memory than 2.7.x or 3.0.x

* Murilo Moreira de Oliveira <murilo.moreira_at_gmail.com>:
> Hi guys. I'm using squid 3.1.4 and since of first 3.1 stable release I'm
> suffering from memory leak problems too. My production server is a CentOS
> 5.4 32 bits (kernel 2.6.18-164.6.1.el5). It has 2GB of RAM (512MB reserved
> to squid cache_mem) and 6GB of disk space reserved to squid's disk cache. In
> approximately 24h, squid consumes all the available memory of my server and
> swap starts to be consumed. I'm currently restarting squid once a day in
> order to workaround the problem. Follow attached a squidclient output made
> some hours before all the server memory be consumed.

Today I performed some more tests and completely disabled delay_pools
in 3.1.5 and checked if that may fix the excessive memory usage

After a short while, memory use skyrocketed - again.

One interessant observation I made is that squid-rrd/1day.cgi reports a
sudden spike in "Cached Objects -- 1 day"

With 3.0.x, the number of objects cached in memory was more or less
constant (see green line), once 3.1.5 took over, the numbers skyrocket
(peak at 1.8M, meaning it's actually only 18.000 items)

The image can be found here: http://www.arschkrebs.de/bugs/squid-object.png

This image had been created using poll.pl:

# Originally at:
# http://wessels.squid-cache.org/squid-rrd/
# Rewritten by Dan Kogai <dankogai_at_dan.co.jp>
# Rewritten by Duane Wessels <wessels_at_squid-cache.org>
# poll.pl,v 1.9 2004/03/30 18:55:27 wessels Exp

According to the source, these (the green graph) are created from the
"hot" items:

        $Vals{nhot} = $1 if (/(\d+)\s+Hot Object Cache Items/i);

objects => {
        DS => {
                disk => { format => '%d', type => 'GAUGE', valkey => 'nobj', },
                mem => { format => '%d', type => 'GAUGE', valkey => 'nhot', },
Received on Wed Jul 28 2010 - 16:13:16 MDT