Messages in this thread | | | Date | Mon, 24 May 1999 08:56:12 -0700 | From | Dan Kegel <> | Subject | Re: High load under Apache1.3.3/mod_perl 1.16/Linux2.2.7 SMP |
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Mike Whitaker wrote: > This is getting into heavy Linux, so I've dropped modperl from the cc: .. You should probably cc linux-kernel from here on out. (Original thread archived at http://mail.nl.linux.org/lists/linuxperf/1999-05/msg00225.html )
> We're up with 2.3.3 plus Andi Kleen's tcp_do_sendmsg patch plus Apache > sleeping in accept() on one production server, and comparing it against a > 2.2.7 plus tcp_do_sendmsg patch plus Apache sleeping in flock(). Identical > systems (dual PII450, 1G, two disk controllers). > > As far as I can *tell*, the wake-one patch is definitely doing its stuff: > the 2.2.7 machine still has cycles of load into three figures, and the 2.3.3 > machine hasn't actully managed a load of 1 yet. > > UNFORTUNATELY, observation suggests that the 2.3.3 machine/Apache > combination is dropping/ignoring about one connection in ten, maybe more. > (Network error: connection reset by peer.) > > As far as I can *see* there's nothing in either Apache error log (for either > httpd), and it is quite often missing the proxy reauest from localhost to > localhost:8989 (proxying the mod_perl ad). > > Thoughts?
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