SORT_PINNABLE_CACHE_PERCENT Option

Specifies the maximum percentage of currently available buffers a sort object tries to pin.

Allowed Values

0 – 100

Default

Scope

Option can be set at the database (PUBLIC) or user level. When set at the database level, the value becomes the default for any new user, but has no impact on existing users. When set at the user level, overrides the PUBLIC value for that user only. No system privilege is required to set option for self. System privilege is required to set at database level or at user level for any user other than self.

Requires the SET ANY PUBLIC OPTION system privilege to set this option. Can be set temporary for an individual connection or for the PUBLIC role. Takes effect immediately.

Description

For very large sorts, a larger value might help reduce the number of merge phases required by the sort. A larger number, however, might impact the sorts and hashes of other users running on the system. If you change this option, experiment to find the best value to increase performance, as choosing the wrong value might decrease performance.

Tip: Use the default value for SORT_PINNABLE_CACHE_PERCENT.

This option is primarily for use by Sybase Technical Support. If you change the value of SORT_PINNABLE_CACHE_PERCENT, do so with extreme caution.