Re: CPU utilisation = 99% => death; help, please!

["John Madden" <jmadden@ivy.tec.in.us>]

> we have set up OpenLDAP v2.0.15 on RH Linux 7.1 on a 2 CPU 800MHz Acer
> box.  We are authenticating about 5000 users with LDAP, with automount
> home directories.  We are providing password, group and automount info
> to our laboratories.  We have up to 200 users on the system at once.
> LDAP stops several times a day.  I watched this happen on /usr/bin/top
> today; usage went up to 99%.  I am working arround this using a cron
> job that checks the output of ps and restarts ldap if necessary, but we
> have a serious problem, and after reading all the documentation, am
> unsure what to do next.  I am now running 2.4.10-ac12, but have tried
> many kernels.

I understand 2.4.10 has serious issues with network load and simply dying,
so you might try 2.2.19 as it's much more stable than anything in 2.4, but I
doubt that's the problem here.

First off, show us some more debugging.  Is it a segfault?  Is it being
killed by the kernel OOM killer?

As for the 99% cpu thing, you probably need some more indexes.

John




-- 
John Madden
UNIX Systems Engineer
Ivy Tech State College
jmadden@ivy.tec.in.us