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WEBSPHERE PORTAL V6.1 TUNING GUIDE
Directory Server Tuning
Our measurements used IBM Tivoli Directory Server versions 6.0 as the directory server.
These products use a database for storing user information; DB2 Enterprise Server was
used for this database in our environment. This database is typically located on the same
system as the directory server. If your workload involves creating, updating, or deleting
users, then database maintenance described above may be needed on this database.
The following table shows the tuning values used for the directory servers in our Solaris
Base Portal Scenario measurements
How-to-Set: These values are in the file /opt/IBM/ldap/V6.0/etc/SchemaV6.0/ibmslapd.conf. You
must restart the LDAP server after changing these values.
Table 9: IDS Tuning
Parameter Value
Ibm-slapdACLCacheSize
250000
Ibm-slapdEntryCacheSize
250000
Ibm-slapdFilterCacheSize
250000
Ibm-slapdFilterCacheBypassLimit
7500
The IBM Tivoli Directory Server uses IBM DB2 as the database server. The database
instance and alias are named IDSLDAP. We applied the following tuning to this database:
db2 “update db config for idsldap using dbheap 4800”
db2 “update db config for idsldap using num_ioservers 10”
db2 “update db config for idsldap using num_iocleaners 5”
db2 alter bufferpool LDAPBP size 3690
db2 alter bufferpool IBMDEFAULTBP size 88500
