Database Plug-in Attributes
138
Netscape Directory Server Configuration, Command, and File Reference • December 2001
nsslapd-db-durable-transactions
Indicates whether database transactions log entries are immediately written to the
disk. The database transaction log contains a sequential listing of all recent
database operations and is used for database recovery only. With durable
transactions enabled, every directory change will always be physically recorded in
the log file and therefore be able to be recovered in the event of a system failure.
However, the durable transactions feature may also slow the performance of the
Directory Server. When durable transactions is disabled, all transactions are
logically written to the database transaction log but may not be physically written
to disk immediately. If there was a system failure before a directory change was
physically written to disk, that change would not be recoverable. The
nsslapd-db-durable-transactions
attribute is absent from
dse.ldif
. To
disable durable transactions, you add the attribute to
dse.ldif
.
This attribute is provided only for system modification/diagnostics and should be
changed only with the guidance of Netscape engineering staff and Netscape
Professional Services. Inconsistent settings of this attribute and other configuration
attributes may cause the Directory Server to be unstable.
For more information on database transaction logging, see Chapter 12,
“Monitoring Server and Database Activity” in the Netscape Directory Server
Administrator’s Guide.
nsslapd-db-home-directory
Solaris only. Used to fix a situation in Solaris where the operating system endlessly
flushes pages. This flushing can be so excessive that performance of the entire
system is severely degraded.
This situation will occur only for certain combinations of the database cache size,
the size of physical memory, and kernel tuning attributes. In particular, this
situation should not occur if the database cache size is less than 100mb.
Entry DN
cn=config,cn=ldbm database,cn=plugins,cn=config
Valid Range
on | off
Default Value
on
Syntax
DirectoryString
Example
nsslapd-db-durable_transactions: on
