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Re: Performance Problems
Have you tried changing/setting some of the bdb tunables?
You might try setting DB_TXN_NOSYNC while you're running slapadd,
that can make a big difference. You might also want to increase
the size of your bdb cache, if I remember right they default pretty small.
On Mon, Nov 11, 2002 at 01:01:42PM -0800, Christoph Neumann wrote:
> We are testing openldap 2.1.8 as a slave in our production enviroment. We
> have experienced serveral problems. I am wondering if other people are
> experiencing the same problems or if they have solved some of these
> Some notes about configuration:
> * have about 20,000 entries--mostly "people" entries
> * using BDB backend (db4-4.0.14-14 installed)
> * indexing several fields:
> index objectClass pres,eq
> index uid pres,eq,sub
> index uidNumber pres,eq
> index gidNumber pres,eq
> index mailacceptinggeneralid eq
> index apuidnumber eq
> index rid eq
> 1. slapadd is *very* slow compared to the using slapadd with back-ldbm on
> openldap 2.0.25. slapadd now takes about 45 minutes, whereas it used to
> take about 4 minutes. The only way I have found to fix this, is to
> slapadd with all the indexes turned off. Which leads to my next
> 2. slapindex is *very* slow. It takes about 45 minutes to reindex. It
> doesn't matter if slapd is running or not. It still take forever.
> 3. My "uidNumber" index is corrupt. I rebuilt the database from an LDIF
> when I upgraded the slave to 2.1.8, so there still must be index
> corruption issues.
> Anyone else experiencing this? Anyone have ideas on what might be going
> on? I have never had OpenLDAP behave this slowly on me before.
> - Christoph
Information and Communication Technologies
New Mexico State University
Email: firstname.lastname@example.org Phone: 505-646-6034 Fax: 505-646-4560