Messages in this thread | | | Date | Mon, 24 May 1999 19:29:53 +0100 | Subject | Re: High load under Apache1.3.3/mod_perl 1.16/Linux2.2.7 SMP | From | "Mike Whitaker" <> |
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More from life's rich learning curve applying unofficial patches is just the first step to writing your own kernel code.... I could stop, If I wanted .... > 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.
For those who were following this on the linux-perf list: we finally got an engineer to the machine we had running 2.2.8+andrea1, to find that (with a reasonable degree of certainty) it had died of the 2.2.8 bdfush/update disaster.
I'm building 2.2.9+andrea3 (I really need that wake-one fix) to see if it behaves better under heavy web load than 2.3.3. -- Mike Whitaker / Tel: +44-1733-766619 | Email: mike@cricket.org CricInfo Ltd / Fax: +44-1733-346287 | Emergency: mike@sms.cricket.org Technical / Mobile: +44-7971-977375 | Mobile: mike@mobile.cricket.org Manager / GSM Fax: +44-7970-219651 | Web: http://www.cricket.org/
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