Red Hat Directory Server 8.0 Configuration, Command, and File Reference

Parameter Description
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-db-verbose: off
4.1.20. nsslapd-dbncache
This attribute can split the LDBM cache into equally sized separate pieces of memory. It is
possible to specify caches that are large enough so that they cannot be allocated contiguously
on some architectures; for example, some releases of Solaris limit the amount of memory that
may be allocated contiguously by a process. If nsslapd-dbncache is 0 or 1, the cache will be
allocated contiguously in memory. If it is greater than 1, the cache will be broken up into
ncache, equally sized separate pieces of memory.
To configure a dbcache size larger than 4 gigabytes, add the nsslapd-dbncache attribute to
cn=config, cn=ldbm database, cn=plugins, cn=config between the
nsslapd-dbcachesize and nsslapd-db-logdirectory attribute lines.
Set this value to an integer that is one-quarter (1/4) the amount of memory in gigabytes. For
example, for a 12 gigabyte system, set the nsslapd-dbncache value to 3; for an 8 gigabyte
system, set it to 2.
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.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=config, cn=ldbm database, cn=plugins,
cn=config
Valid Values 1 to 4
Default Value 1
Syntax Integer
Example nsslapd-dbncache: 1
4.1.21. nsslapd-directory
This attribute specifies absolute path to database instance. If the database instance is manually
created then this attribute must be included, something which is set by default (and modifiable)
in the Directory Server Console. Once the database instance is created, do not modify this path
cn=ldbm database, cn=plugins, cn=config
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