Database Plug-in Attributes136 Netscape Directory Server Configuration, Command, and File Reference • December 2001nsslapd-dbcachesizeThis performance tuning related attribute specifies database cache size. Note thatthis is neither the index cache nor the entry cache. If you activate automatic cacheresizing, you override this attribute, by replacing these values with its ownguessed values at a later stage of the server startup.If you attempt to set a value that is not a number or is too big for a 32-bit signedinteger you will receive an LDAP_UNWILLING_TO_PERFORM error messagewith additional error information explaining the problem.nsslapd-db-checkpoint-intervalThe amount of time in seconds after which the Directory Server sends a checkpointentry to the database transaction log. The database transaction log contains asequential listing of all recent database operations and is used for databaserecovery only. A checkpoint entry indicates which database operations have beenphysically written to the directory database. The checkpoint entries are used todetermine where in the database transaction log to begin recovery after a systemfailure. The nsslapd db-checkpoint-interval attribute is absent fromDefault Value 66 (This will not necessarily optimize your operations)Syntax IntegerExample nsslapd-cache-autosize-split: 66Entry DN cn=config,cn=ldbm database,cn=plugins,cn=configValid Range 500KB to 4GB for 32-bit platforms and 500KB to 2^64-1 for 64-bitplatformsDefault Value 10,000,000 bytesSyntax IntegerExample nsslapd-dbcachesize: 10,000,000NOTE On HP-UX only the maximum value for the nsslapd-dbcachesizeattribute is 1GB, due to a PA-RISC hardware limitation that preventsmemory-mapped files from crossing quadrant boundaries.
