Re: slapd responds very slowly when cpu has 100% usage (but actually low load)
Antonis Christofides wrote:
(My original message, which presents the problem, is at the bottom.)
Thank you for your responses, here is some more information:
> You didn't mention what version of slapd you're running.
That's right, sorry. I'm running Debian-packaged slapd 2.2.23-8,
using bdb 4.2.52-18 (everything on my system is the Debian sarge's
packages, except for the kernel, which is a recompiled Ubuntu 6.06
kernel, 2.6.12 SMP).
You need to upgrade to OpenLDAP 2.3. There were a lot of gratuitous
sched_yield() calls in OpenLDAP 2.2 that were removed in 2.3. These
sched_yield() calls behave poorly with the scheduler in the Linux 2.6
kernel.
--
-- Howard Chu
Chief Architect, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc
OpenLDAP Core Team http://www.openldap.org/project/