FreeBSD 9.1 - openldap slapd lockups, mutex problems

[Oliver Brandmueller]

Hi,

On Thu, Feb 14, 2013 at 03:13:57AM +0100, Pierre Guinoiseau wrote:
> > I have seen openldap spin the cpu and even run out of memory to get 
> > killed on some of our test systems running ~9.1-rel with zfs.
[...]
> I've the same problem too, inside a jail, stored on ZFS. I've tried various
> tuning in slapd.conf, but none fixed the problem. While hanging, db_stat -c
> shows that all locks are being used, I've tried to set the limit really high,
> far more than normally needed, but it didn't help. I may have the same problem
> with amavisd-new but I've to verify that to be sure the symptoms are similar.

I have amd64 9.1-STABLE r245456 (about Jan 15) running. I have openldap 
openldap-server-2.4.33_2 running, depending on libltdl-2.4.2 and 
db46-4.6.21.4 .

The system is zfs only (for the local filesystems, where openldap is 
running - it has several NFS mounts for other purposes though). It's up 
and running for about a month now (29 days) and never showed any 
problematic behaviour regarding to slapd.

I have ~10 SEARCH requests per seconds avg and only minor 
ADD/MODIFY/DELETE operations. It has several binds und unbinds, about 
1/10th of the requests. It runs in slurpd slave mode for my master LDAP.

zroot/var/db runs with compression=off, dedup=off, zroot is a mirrored 
pool on 2 Intel SATA SSD drives inside a GPT partition. Swap is on a ZFS 
zvol.

- Oliver


-- 
| Oliver Brandmueller          http://sysadm.in/         ob at sysadm.in |
|                        Ich bin das Internet. Sowahr ich Gott helfe. |
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