[squid-users] squidaio_queue_request: WARNING - Queue congestion

Amos Jeffries squid3 at treenet.co.nz
Thu Oct 15 09:43:01 UTC 2015

On 15/10/2015 7:34 p.m., Reet Vyas wrote:
> HI
> I am getting this error in my squid,
> Squid Version : 3.5.3,
> Can anyone help me out with this cause browsing is slow when I get this in
> cache.log file.

Two problems;

#0 it is not an error. Errors get logged with the word "error" or

#1 your disk I/O queue was not big enough for the traffic being
processed through it. Squid is increasing the queue size automatically,
and warning you about the change. That is all.
 On older Squid you can expect a few (maybe a few dozen) on startup, and
on the first time it goes through a traffic peak. queue growth is
exponential. It is only a problem if it continues for a long time.

#2 your Squid version is outdated. Current Squid version is 3.5.10 and
includes a number of bug fixes relating to disk I/O issues. Any one of
those could be contributing to the "slow".


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