Apache and heavily loaded servers

Apache and heavily loaded servers

Post by Ben Lauri » Fri, 15 Mar 1996 04:00:00

> Hi--

> I am running a *very* busy site--million-plus hits a day, more and more
> parsed files all the time. We're running three instances of Apache 1.0.3 in
> round-robin on a SPARC 20 using SunOS 4.1.3. We've already turned off dns
> lookup. When the servers first fire up, the speed improvement over our last
> server (NCSA 1.4.x) is impressive. But the longer they're up, the slower
> they get until they're almost GLACIAL. Hup them, everything speeds up again.
> Then it bogs down again. Lather, rinse, repeat. We're tearing our hair out.
> The error logs are showing time outs and this unusual (to me) entry:

> send lost connection to client

> and the occasional

> read lost connection to client

The messages are new - we tightened up error reporting in 1.0.3 and thus
some new messages appeared. Lost connections would usually be caused by
clients dropping the link. Even if you see a correlation between this and
speed the causal link could go in either direction  ;-)


> Help?

Hmmmm ... some more detail in these "three instances in round-robin" and
perhaps some system stats on both a fresh start, and a long running
system (like memory usage etc.) might aid diagnosis.


Ben (Apache Group member).


> Lynn
> --
> ***********          Lynn Siprelle, Teleport Web*          **********
>      Weaving the Web at Teleport--http://www.veryComputer.com/
>        One Useful Thing & One Cool Thing--http://www.veryComputer.com/
>          The Web*'s Bookmarks--http://www.veryComputer.com/~www/

Ben Laurie, * Consultant and      | Phone: +44 (181) 994 6435
Technical Director, A.L. Digital Ltd,     | Fax:   +44 (181) 994 6472


1. Heavily loaded Apache


we have some WWW servers here running under one Apache server.
One of them is quite heavily loaded, about 80 users all the
time (your wife better doesn't know, if you're one of them :-),
the others don't have very much traffic.

Of course the bottleneck is bandwidth and this bottleneck hits
all servers, not just the only one. Is there any chance to
reduce the heavy loaded servers traffic (for example by
limiting the number of users), so that the other servers
have a better chance to be reachable?



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