Nsslapd-Db-Page-Size; Nsslapd-Db-Spin-Count; Nsslapd-Db-Transaction-Batch-Val - Netscape DIRECTORY SERVER 6.02 Configuration Manual

nsslapd-db-page-size

Specifies the size of the pages used to hold items in the database in bytes. The
minimum size is 512 bytes and the maximum size is 64K bytes. If the page size is
not explicitly set, Directory Server defaults to a page size of 8K bytes. Changing
this default value can have signficant performance impact. If the page size is too
small, it results in extensive page splitting and copying, whereas if the page size is
too large it can waste disk space.
Before modifying the value of this attribute export all databases using the
script. Once the modification has been made, reload the databases using the
script.
ldif2db
Entry DN:
cn=config,cn=ldbm database,cn=plugins,cn=config
Valid Range: 512 bytes to 64 K bytes
Default Value:
8K bytes
Syntax: Integer
Example:
nsslapd-db-page-size: 8K bytes

nsslapd-db-spin-count

Specifies the number of times that test-and-set mutexes should spin without
blocking.
Entry DN:
cn=config,cn=ldbm database,cn=plugins,cn=config
Valid Range: Operating system dependent
Default Value:
0
Syntax: Integer
Example:
nsslapd-db-spin-count: 0

nsslapd-db-transaction-batch-val

Specifies how many transactions will be 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
further information on modifying this attribute, see Chapter 14, "Tuning Directory
Server Performance" in the Netscape Directory Server Administrator's Guide.
Chapter 3 Plug-in Implemented Server Functionality Reference
Database Plug-in Attributes
db2ldif
. For
ldapmodify
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