nsslapd-db-transaction-batch-val

number of database transactions to batch before commit

Description

Specifies how many transactions are batched before being committed. You can use this attribute to improve update performance when full transaction durability is not required. This attribute can be dynamically modified using ldapmodify.

If you do not define this attribute or set it to a value of 0, transaction batching will be turned off and it will be impossible to make remote modifications to this attribute via LDAP. However, setting this attribute to a value greater than 0 causes the server to delay committing transactions until the number of queued transactions is equal to the attribute value. A value greater than 0 also allows you to modify this attribute remotely via LDAP. A value of 1 for this attribute allows you to modify the attribute setting remotely via LDAP, but results in no batching behavior. A value of 1 at server startup is therefore useful for maintaining normal durability, while also allowing transaction batching to be turned on and off remotely when desired. Bear in mind that the value you choose for this attribute may require you to modify the nsslapd-db-logbuf-size attribute to ensure sufficient log buffer size for accommodating your batched transactions. In practice, values should be positive numbers. Values larger than 100 bring few benefits.

Note:

The nsslapd-db-transaction-batch-val attribute is only valid if the nsslapd-db-durable-transaction attribute is set to on.

Entry DN: cn=config,cn=ldbm database,cn=plugins,cn=config
Valid Range: -2147483647 to 2147483648
Default Value: 0 (meaning turned off)
Syntax: Integer
Example: nsslapd-db-transaction-batch-val: 5

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	SUNWdsee7
Stability Level	Obsolete: Scheduled for removal after this release