Re: RE24 (2.4.15) slapd consuming large amounts of CPU

[John Morrissey <jwm@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@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.

> Also, are you using a shared memory key?  I've found that has a
> significant (positive) impact with BDB 4.7 on linux boxes.

We are not. Thanks, I'll give that a try.

john
-- 
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