Red Hat DIRECTORY SERVER 8.0 Command Reference Manual page 134

Chapter 3. Plug-in Implemented Server Functionality Reference
3.4.1.18. nsslapd-db-trickle-percentage
This attribute sets that at least the specified percentage of pages in the shared-memory pool are clean
by writing dirty pages to their backing files. This is to ensure that a page is always available for reading
in new information without having to wait for a write.
Parameter
Entry DN
Valid Range
Default Value
Syntax
Example
3.4.1.19. nsslapd-db-verbose
This attribute specifies whether to record additional informational and debugging messages when
searching the log for checkpoints, doing deadlock detection, and performing recovery. This parameter
is meant for troubleshooting, and enabling the parameter may slow down the Directory Server.
Parameter
Entry DN
Valid Values
Default Value
Syntax
Example
3.4.1.20. 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.
124
Description
cn=config, cn=ldbm database, cn=plugins,
cn=config
0 to 100
40
Integer
nsslapd-db-trickle-percentage: 40
Description
cn=config, cn=ldbm database, cn=plugins,
cn=config
on | off
off
DirectoryString
nsslapd-db-verbose: off