Performance Problems with OpenLDAP

["Christoph Gerber" <Christoph.Gerber@marconi.com>]

We are using OpenLDAP 2.0.25 and ldbm on HP-UX 11i. After many write
operations the performance for read and write access slows down
considerably. Loading 3000 objects takes over an hour. When we reorganise
the database with ldif export and slapadd import, it is fast again (4
minutes). The ldap server runs on a hp 4 x 750 MHZ PA RISC Server with 8
GBRAM. Processor load for slapd, shown with top is on the limit.
Any ideas?

Here is our configuration file:

#ldbm database definitions


#define schema db

concurrency        32
database        ldbm
suffix          "cn=Schema,cn=Resources"
rootdn          "cn=Resources"
rootpw          xyf23423423
directory       /usr/local/ldap/schemadb
index   default         pres,eq

index   objectClass     eq

readonly on


#define data db

database        ldbm
suffix          "cn=Resources"
rootdn          "cn=Resources"
rootpw          xyf23423423
directory       /usr/local/ldap/datadb
index   default         pres,eq
index   objectClass     eq
sockbuf_max_incoming 4194304
cachesize 10000
dbcachesize 100000




 Best Regards

Christoph Gerber