RecoveryThreads
The RecoveryThreads attribute determines the number of threads used to rebuild indexes during recovery.
If RecoveryThreads=1, during recovery, indexes that must be rebuilt are done serially. If you have enough processors available to work on index rebuilds on your computer, setting this attribute to a number greater than 1 can improve recovery performance. The performance improvement occurs only if different processors can work on different indexes. There is no parallelism in index rebuild within the same index.
The value of RecoveryThreads can be any value up to the number of CPUs available on your system.
The default is 1 when the database is created. Upon subsequent connections, if the database must be recovered and RecoveryThreads is unspecified or has a value of 0, then TimesTen uses the previous setting for this attribute.
Required Privilege
Only the instance administrator can change the value of this attribute.
Usage in TimesTen Scaleout and TimesTen Classic
This attribute is supported in both TimesTen Classic and TimesTen Scaleout.Setting
Set RecoveryThreads as follows:
| Where to set the attribute | How the attribute is represented | Setting |
|---|---|---|
|
C or Java programs or UNIX and Linux systems |
|
|
|
Windows ODBC Data Source Administrator |
Not applicable |
Note:
For a progress report on the recovery process, see the rebuild messages in the daemon log.
Set the number of threads low enough to leave sufficient resources on the TimesTen server for other services/processes.