Red Hat DIRECTORY SERVER 8.1 Command Reference Manual page 84

Chapter 2. Core Server Configuration Reference
When more backends are replicated or when one backend is replicated to more than one consumer,
tune the nsslapd-cachememsize so that its value is 5000000 times the number of replication
agreements initiated from the server (5000000 * no_of_repl_agreements).
The relationship between the values assigned to the nsslapd-dbcachesize and nsslapd-
cachememsize parameters should be the same as the relationship that is described in the database
tuning section.
The cn=changelog5,cn=config entry is an instance of the extensibleObject object class.
NOTE
Two different types of changelogs are maintained by Directory Server. The first type,
which is stored here and referred to as the changelog, is used by multi-master
replication; the second changelog, which is actually a plug-in and referred to as the retro
changelog, is for compatibility with some legacy applications. See
Changelog Plug-in"
2.3.2.1. nsslapd-changelogdir
This required attribute specifies the name of the directory in which the changelog database is created.
Whenever a changelog configuration entry is created, it must contain a valid directory; otherwise,
the operation is rejected. The GUI proposes by default that this database be stored in /var/lib/
dirsrv/slapd-instance_name/changelogdb.
WARNING
If the cn=changelog5 entry is removed, the directory specified in the nsslapd-
changelogdir parameter, including any subdirectories, are removed, with all of their
contents.
NOTE
For performance reasons, store this database on a different physical disk.
The server has to be restarted for changes to this attribute to go into effect.
Parameter
Entry DN
Valid Values
Default Value
Syntax
Example
70
for further information about the Retro Changelog Plug-in.
Description
cn=changelog5,cn=config
Any valid path to the directory storing the
changelog
None
DirectoryString
nsslapd-changelogdir: /var/lib/dirsrv/
slapd-instance_name/changelogdb
Section 3.1.29, "Retro