Re: Read Performance during Replication on Slave

[Adam Tauno Williams <adam@morrison-ind.com>]

> > iÂm maintaining a openldap-infrastructure with 1 master and 7 slaves
> > (slurpd-replication). The bdb-database have about 1 million entrys (2
> > GB). Every morning we make a "provisioning" with new or deleted entrys
> > (a perl skript, that adds one entry after the other).
> > This takes about 3-5 hours (2000-5000 entrys) of replication. During
> > this time, the read-operations on the slaves are very bad, so that our
> > radius-servers have timeouts and users cannot authenticate.
> Write operations of 2 to 5 k should only take a few minutes, thus your
> overall performance should be optimised.

Agree.  We have a DSA that is on 'low-end' hardware -
2x1GHz/2GbRAM/2-SCSI-drives - and adding 2000 objects takes just over a
minute, and that is with indexing of attributes, etc...

I'd make sure your DB_CONFIG settings are sane.

> Depending on the OpenLDAP version and hardware, there are some
> configuration parameters to tune database, memory and overall
> performance.