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cn=plugins, cn=config

Valid Range

1 to 2

-1 on 32-bit systems or 2

6 3

-1 on 64-bit

systems or -1, which means limitless

Default Value -1

Syntax Integer

Example nsslapd-cachesize: -1

3.4 .3.2. nsslapd-cachememsize

This performance tuning-related attribute specifies the size, in bytes, for the available memory space for

the entry cache. The simplest method is limiting cache size in terms of memory occupied. Activating

automatic cache resizing overrides this attribute, replacing these values with its own guessed values at

a later stage of the server startup.

The BerkeleyDB documentation offers a good explanation of what the entry cache is, along with

management information like how to monitor the cache with db_stat -m .

NOTE

The nsslapd-cachememsize attribute also defines the import buffer size. T he import buffer size

is automatically configured to be 80% of whatever the nsslapd-cachememsize setting is. When

importing databases with very large attributes, be sure to reset the nsslapd-cachememsize

value to something high enough so that .80*cacheSize is enough to allow the import to proceed.

Attempting to set a value that is not a number or is too big for a 32-bit signed integer (on 32-bit systems)

returns an LDAP_UNWILLING_TO_PERFORM error message with additional error information explaining

the problem.

NOTE

The performance counter for this setting goes to the highest 64-bit integer, even on 32-bit

systems, but the setting itself is limited on 32-bit systems to the highest 32-bit integer because of

how the system addresses memory.

Parameter Descript ion

Entry DN cn=database_name, cn=ldbm database,

cn=plugins, cn=config

Valid Range

500 kilobytes to 2

-1 on 32-bit systems and to

6 4

-1 on 64-bit systems

Default Value 10,485,760 (10 megabytes)

Syntax Integer

Example nsslapd-cachememsize: 10485760

3.4 .3.3. nssla pd-direct ory

This attribute specifies the path to the database instance. If it is a relative path, it starts from the path

specified by nsslapd-directory in the global database entry cn=config, cn=ldbm database,

cn=plugins, cn=config. The database instance directory is named after the instance name and

located in the global database directory, by default. After the database instance has been created, do

not modify this path, because any changes risk preventing the server from accessing data.

Parameter Descript ion

Entry DN cn=database_name, cn=ldbm database,

cn=plugins, cn=config

Valid Values Any valid path to the database instance

Default Value

Syntax DirectoryString

Example nsslapd-directory:

/var/lib/dirsrv/slapd-instance_name/db/userRoot

3.4 .3.4 . nsslapd-readonly

This attribute specifies read-only mode for a single back-end instance. If this attribute has a value of

off, then users have all read, write, and execute permissions allowed by their access permissions.

Parameter Descript ion

130 Chapter 3. Plug-in Implemented Server Functionality Reference

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