Re: Squid 3.2 performance question

tis 2012-03-20 klockan 16:14 +0400 skrev Alexander Komyagin:

> Yep, looks like I have them in SYN_SENT for 5 secs and then they are
> discarded (timeout for httperf is set for 5 secs).

And what is seen on the server side?

There is mainly two limits that may get hit with such results, not
counting kernel bugs.

a) Firewall connection tracking.

b) Socket listen backlog queue.

'a' shows up in dmesg.

not sure about 'b'.

> > This RSBAC? http://www.rsbac.org/
> >
> > If so, which kernel version?
>
> This one. 2.6.35.10 SMP x86_64.

With which version of the RBAC patch? RBAC 1.4.5 have issues according
to rbac.org, and 2.6.35.10 is in the affected range. Now I do not think
that issue affects socket operations but not 100% sure.

> >From RSBAC logs squid 3.2 produces much more operations on NETLINK RAW
> ROUTE sockets than 3.1. Maybe performance differs due to some changes in
> the Squid interception mechanism in 3.2?

Maybe. Wonder what that is. Amos?

Regards
Henrik
Received on Tue Mar 20 2012 - 20:35:39 MDT