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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Performance GuideThe HCL OneDB™ Performance Guide describes how to configure and operate your HCL OneDB™ database server to improve overall system throughput and to improve the performance of SQL queries.
Improving individual query performanceYou can test, monitor, and improve queries.
Improve performance by adding or removing indexesYou can often improve the performance of a query by adding or, in some cases, removing indexes. You can also enable the optimizer to automatically fetch a set of keys from an index buffer.
Determine the amount of free space in an index pageYou can use the oncheck -pT command to determine the amount of free space in each index page.

Determine the amount of free space in an index page

You can use the oncheck -pT command to determine the amount of free space in each index page.

If your table has relatively low update activity and a large amount of free space exists, you might want to drop and re-create the index with a larger value for FILLFACTOR to make the unused disk space available.