Summary information |
|
|---|---|
Default value |
10 |
Range of values |
1–2147483647 |
Status |
Dynamic |
Display level |
Comprehensive |
Required role |
System Administrator |
Configuration groups |
Memory Use, Meta-Data Cache |
For Adaptive Servers running with multiple engines, partition spinlock ratio sets the number of rows in the partition descriptors that are protected by one spinlock.
Adaptive Server manages access to table partitions using partition descriptors. Each partition descriptor stores information about a partition (for example, the last page of the partition) that processes must use when accessing that partition. Partition descriptors are configured using the configuration parameter number of open partitions.
By default, Adaptive Server systems are configured with partition spinlock ratio set to 10, or 1 spinlock for every 10 partition caches. Decreasing the value of partition spinlock ratio may have little impact on the performance of Adaptive Server. The default setting is correct for most servers.
For more information about configuring spinlock ratios, see “Managing Multiprocessor Servers” on page 123.
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