[389-users] Tuning 389 DS

[Juan Asensio Sánchez]

Hi

I am trying to tune the performance of the Directory Server. We have
increased the memory for the database cache and for each database entry
cache. These are the new values:

cn=config, cn=ldbm database, cn=plugins, cn=config
nsslapd-dbcachesize: 838860800 (~800MB)

cn=*,cn=ldbm database, cn=plugins, cn=config
nsslapd-cachememsize: 125829120 (~120MB)

We have 27 databases, and the servers have 16 GB of RAM, so the server
should be able to handle all that memory (800 + 120*27 = 4040MB). But when I
go to the monitoring section of the management console, the database cache
says the hit ratio is 99% (this is OK according to the documentation, near
100%), but the entry cache is 0%, that is very far for 100% that the
documentation recomends (see screenshots attached). Am I confused or the
configuration is not correct?

Regards.

* http://www.redhat.com/docs/manuals/dir-server/8.1/admin/memoryusage.html
*
http://www.redhat.com/docs/manuals/dir-server/8.1/admin/Monitoring_Server_and_Database_Activity-Monitoring_Database_Activity.html
*
http://www.redhat.com/docs/manuals/dir-server/8.1/admin/Monitoring_Server_and_Database_Activity-Monitoring_Server_Activity.html#tab.Global_Database_Cache_Information
*
http://www.redhat.com/docs/manuals/dir-server/8.1/admin/Monitoring_Server_and_Database_Activity-Monitoring_Server_Activity.html#Monitoring_Server_Activity-Monitoring_the_Server_from_the_DS_Console
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