Re: Wierd context-switching issue on Xeon
Robert Creager <robert_creager@logicalchaos.org>
From: Robert Creager <Robert_Creager@LogicalChaos.org>
To: pg@fastcrypt.com
Cc: Josh Berkus <josh@agliodbs.com>, Dirk_Lutzebäck <lutzeb@aeccom.com>, ohp@pyrenet.fr, Tom Lane <tgl@sss.pgh.pa.us>, Joe Conway <mail@joeconway.com>, "scott.marlowe" <scott.marlowe@ihs.com>, Bruce Momjian <pgman@candle.pha.pa.us>, pgsql-performance@postgresql.org, Neil Conway <neilc@samurai.com>
Date: 2004-05-02T15:20:47Z
Lists: pgsql-performance
Found some co-workers at work yesterday to load up my library... The sample period is 5 minutes long (vs 2 minutes previously): Context switches - avg max Default 7.4.1 code : 48784 107354 Default patch - 10 : 20400 28160 patch at 100 : 38574 85372 patch at 1000 : 41188 106569 The reading at 1000 was not produced under the same circumstances as the prior readings as I had to replace my device under test with a simulated one. The real one died. The previous run with smaller database and 120 second averages: Context switches - avg max Default 7.4.1 code : 10665 69470 Default patch - 10 : 17297 21929 patch at 100 : 26825 87073 patch at 1000 : 37580 110849 -- 20:13:50 up 3 days, 2:58, 4 users, load average: 2.12, 2.14, 2.10 Linux 2.6.5-01 #7 SMP Fri Apr 16 22:45:31 MDT 2004