Horton

Re: Spinlocks, yet again: analysis and proposed patches

Josh Berkus <josh@agliodbs.com>

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From: Josh Berkus <josh@agliodbs.com>
To: pgsql-hackers@postgresql.org
Cc: Greg Stark <gsstark@mit.edu>, Tom Lane <tgl@sss.pgh.pa.us>, Marko Kreen <marko@l-t.ee>
Date: 2005-09-13T16:11:03Z
Lists: pgsql-hackers 
Tom, All:

> It seems to me what you've found is an outright bug in the linux scheduler.
> Perhaps posting it to linux-kernel would be worthwhile.

For people using this on Linux 2.6, which scheduler are you using?   Deadline 
is the recommended one for databases, and does offer significant (+5-8%) 
benefits in some heavy-contention environments, at least in OSDL tests.

-- 
Josh Berkus
Aglio Database Solutions
San Francisco