HP-UX Directory Server 8.1 configuration, command, and file reference

3.4.1.16 nsslapd-db-spin-count
This attribute specifies the number of times that test-and-set mutexes should spin without
blocking.
CAUTION:
Never touch this value unless you are very familiar with the inner workings of Berkeley DB or
are specifically told to do so by HP support.
DescriptionParameter
cn=config, cn=ldbm database, cn=plugins, cn=configEntry DN
0 to 2^31-1Valid Range
0Default Value
IntegerSyntax
nsslapd-db-spin-count: 0Example
3.4.1.17 nsslapd-db-transaction-batch-val
This attribute specifies how many transactions will be batched before being committed. This
attribute can improve update performance when full transaction durability is not required. This
attribute can be dynamically modified using the ldapmodify command. For further information
on modifying this attribute, refer to the "Tuning Directory Server Performance" chapter in the
HP-UX Directory Server administrator guide.
CAUTION:
Setting this value will reduce data consistency and may lead to loss of data. This is because if
there is a power outage before the server can flush the batched transactions, those transactions
in the batch will be lost.
Do not set this value unless specifically requested to do so by HP support.
If this attribute is not defined or is set to a value of 0, transaction batching will be turned off, and
it will be impossible to make remote modifications to this attribute through 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 modififications to this attribute remotely through LDAP. A value of 1 for this attribute
allows modifications to the attribute setting remotely through 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.
Remember that the value for this attribute may require modifying the
nsslapd-db-logbuf-size attribute to ensure sufficient log buffer size for accommodating
the batched transactions.
3.4 Database plug-in attributes 139