Re: Problem with origin server connections

On Tue, 11 Mar 2003 00:40:27 +0100
Henrik Nordstrom <hno@marasystems.com> wrote:

> If your problem is that there is many connections to the backend
> server(s) which does not seem to go away then see primarily the
> half_closed_clients directive.

Yes that is one of the symptoms. So half_closed_clients affects origin
servers as well.

The worse problem, however, is once this probelm occurs (origing servers
"partially" down) squid refuses to serve some objects from cache. The
objects are in the cache and fresh, but squid does an IMS to the origin
for each request for these objects. Every squid server can have several
thousand objects in this state, with several thousand requests for them
per minute. As David said earlier, this problem does not go away until
squid is restarted or "reconfigured."

I dare say we do more traffic than most, if not all, squid users. So,
we could be finding some obscure "bug." I turned on full debug (squid
-k debug) for a few seconds (the log file grew 3+ MB per second!), but I
didn't see anything unusual in them.

--Brian
Received on Tue Mar 11 2003 - 06:50:49 MST