Red Hat Directory Server 8.0 Configuration, Command, and File Reference
Parameter Description
Example nsslapd-dbcachesize: 10,000,000
NOTE
On Solaris, the nsslapd-dbcachesize attribute has no effect on performance
because the disk/filesystem cache overrides it.
4.1.6. nsslapd-db-checkpoint-interval
This sets the amount of time in seconds after which the Directory Server sends a checkpoint
entry to the database transaction log. The database transaction log contains a sequential listing
of all recent database operations and is used for database recovery only. A checkpoint entry
indicates which database operations have been physically written to the directory database. The
checkpoint entries are used to determine where in the database transaction log to begin
recovery after a system failure. The nsslapd-db-checkpoint-interval attribute is absent
from dse.ldif. To change the checkpoint interval, add the attribute to dse.ldif. This attribute
can be dynamically modified using ldapmodify. For further information on modifying this
attribute, see the "Tuning Directory Server Performance" chapter in the Directory Server
Administrator's Guide.
This attribute is provided only for system modification/diagnostics and should be changed only
with the guidance of Red Hat technical support or Red Hat professional services. Inconsistent
settings of this attribute and other configuration attributes may cause the Directory Server to be
unstable.
For more information on database transaction logging, refer to the "Monitoring Server and
Database Activity" chapter in the Directory Server Administrator's Guide.
Parameter Description
Entry DN cn=config, cn=ldbm database, cn=plugins,
cn=config
Valid Range 10 to 300 seconds
Default Value 60
Syntax Integer
Example nsslapd-db-checkpoint-interval: 120
4.1.7. nsslapd-db-circular-logging
This attribute specifies circular logging for the transaction log files. If this attribute is switched
off, old transaction log files are not removed and are kept renamed as old log transaction files.
Turning circular logging off can severely degrade server performance and, as such, should only
cn=ldbm database, cn=plugins, cn=config
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