7.4. Adjusting the DN cache size in the IdM Directory Server

Procedure

1. Optional: Display the database suffixes and their corresponding database names.

   [root@server ~]# dsconf -D "cn=Directory Manager" ldap://<server_fqdn> backend suffix list
   dc=example,dc=com (userroot)

   This command displays the name of the back end database next to each suffix. Use the suffix’s database name in the next step.

2. Set the DN cache size for the database. This example sets the DN cache to 20 megabytes.

   [root@server ~]# dsconf -D "cn=Directory Manager" ldap://<server_fqdn> backend suffix set --dncache-memsize=20971520 userroot

3. Restart the Directory Server.

   [root@server ~]# systemctl restart dirsrv.target

4. Monitor the IdM Directory Server’s performance. If it does not improve, repeat this procedure and adjust dncache-memsize to a different value, or back to the default of 10 MB.