--On Wednesday, March 04, 2009 3:30 PM -0500 John Morrissey <jwm(a)horde.net>
On Wed, Mar 04, 2009 at 12:13:49PM -0800, Quanah Gibson-Mount wrote:
> --On Wednesday, March 04, 2009 1:55 PM -0500 John Morrissey
> <jwm(a)horde.net> wrote:
> > After a few hours of uptime, slapd suddenly begins consuming enormous
> > amounts of CPU (a three- to four-fold increase over less than a few
> > minutes, and is sustained until slapd is restarted).
> Interseting. I've seen this sort of CPU usage issue with OpenLDAP
> 2.3/BDB4.2.52 on Ubuntu 8. Do you know how BDB 4.7 was built? I.e.,
> specifically, did it have the:
> --enable-posixmutexes --with-mutex=POSIX/pthreads
> options enabled?
It's the Debian packaging for BDB 4.7 (only available in sid, but it's a
simple rebuild to backport to lenny). They do *not* appear to pass any
mutex-related options to ./configure.
Yeah, that's a major problem in using Debian's builds of BDB. You want
those options sent to configure when using BDB on Linux NPTL systems.
> Also, are you using a shared memory key? I've found that has
> significant (positive) impact with BDB 4.7 on linux boxes.
We are not. Thanks, I'll give that a try.
No prob. :) You may have to adjust some settings in sysctl to do it. ;)
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