Re: buffer question

On Wed, 20 Sep 2000, Dayman Cash wrote:

> i am using your latest stable benchmark for squid 2.3. everytime i
> run the polysrv or squid using the polyclt, polygraph will echo to
> me 'error (via Connection.cc) insufficient buffer space' if i try to
> run more than 10 requests/sec. will you please tell me exactly what
> the problem is and how to fix it. i have tried an older stable
> version of polygraph, but same error.

Have you done any tuning for your OS? If you have limited network buffer
resources, Polygraph may eat them up even at 10 req/sec. Note, for
example, that untuned TCP stack may keep a closed connection for at
least 60 seconds, giving you more that 600 concurrent connections
(visible to the kernel) even at that low request rate.

See the "tips" page on the Polygraph site for some tuning advice. You
can also get a FreeBSD snapshot with all the latest Polygraph-specific
patches from measurement-factory.com site.

Alex.