LogBufParallelism
The LogBufParallelism attribute specifies the number of transaction log buffer strands to which TimesTen writes log files before the log is written to disk, allowing for improved log performance.
Strands divide the transaction log buffer available memory into a number of different regions, which can be accessed concurrently by different connections. Each connection can execute data-independent DML statements in parallel using those strands as if each has its own transaction log buffer.
Each buffer has its own insertion latch. Records are inserted in any of the strands. The log flusher gathers records from all strands and writes them to the log files.
If you change the value of LogBufParallelism, you also may need to change the value of LogBufMB to satisfy the constraint that LogBufMB/LogBufParallelism >= 8.
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 LogBufParallelism as follows:
| Where to set the attribute | How the attribute is represented | Setting |
|---|---|---|
|
C or Java programs or UNIX and Linux systems |
|
An integer value between 1 and 64. The default is |
|
Windows ODBC Data Source Administrator |
Not applicable |