Re: Squid 3.2 performance question

tis 2012-03-20 klockan 13:09 +0400 skrev Alexander Komyagin:
> Sorry for disinformation, BIND requests are present in both RSBAC logs.
> IOCTL's were removed by adding --disable-eui to Squid configuration
> command, but that did not give any performance increase.

ok

> On Tue, 2012-03-20 at 12:37 +0400, Alexander Komyagin wrote:

> > > >> Also according to logs, that clients timeouts are caused by some of new
> > > >> connections not being spotted and accepted as well (not gone through
> > > >> doAccept() routine from TcpAcceptor.cc).

Do you have sockets hanging in SYN_SENT state?

Or are they ESTABLISHED but not picked up for procssing by Squid?

> > Alex, I have performed some more tests (including oprofile profiling,
> > no-daemon mode, 1 worker, 2 workers, etc.). For now, it seems that the
> > problem is highly related to RSBAC Networking which is enabled in our
> > kernel. When I disabled it, the performance issue _has gone_. According
> > to RSBAC logs, no single operation is denied.

This RSBAC? http://www.rsbac.org/

If so, which kernel version?

> > By comparing oprofile results for 3.2 with and w/o RSBAC-Net, I can
> > assume that RSBAC-Net subsystem performs some internal operations on
> > list structures, which are indeed protected by locks - and this, in my
> > point of view, may block simultaneous squid socket operations and affect
> > performance.

Possible. We would not know.

Regards
Henrik
Received on Tue Mar 20 2012 - 11:35:59 MDT