[squid-users] Squid3: 100 % CPU load during object caching

[Eliezer Croitoru]

On 22/07/2015 21:59, Eliezer Croitoru wrote:
> Hey Jens,
>
> I have tested the issue with LARGE ROCK and not AUFS or UFS.
> Using squid or not my connection to the server is about 2.5 MBps (20Mbps).
> Squid is sitting on an intel atom with SSD drive and on a HIT case the
> download speed is more then doubled to 4.5 MBps(36Mbps).
> I have not tried it with AUFS yet.


And I must admit that AUFS beats rock cache with speed.
I have tried rock with basic "cache_dir rock /var/spool/squid 8000" vs 
"cache_dir aufs /var/spool/squid 8000 16 256" and the aufs cache HIT 
results more then doubles 3 the speed rock gave with default settings.

So about 15MBps which is 120Mbps.
I do not seem to feel what Jens feels but the 100% CPU might be because 
of spinning disk hangs while reading the file from disk.

Amos, I remember that there were some suggestions how to tune large rock.
Any hints?
I can test it and make it a suggestion for big files.

Eliezer