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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.
Table performance considerationsSome performance issues are associated with unfragmented tables and table fragments.
Managing extentsAs you add rows to a table, the database server allocates disk space in units called extents. Each extent is a block of physically contiguous pages from the dbspace. Even when the dbspace includes more than one chunk, each extent is allocated entirely within a single chunk, so that it remains contiguous.
Monitoring the upper limit on extents and extent interleavingYou can monitor the upper limit on the number of extents. You can also check for and eliminate extent interleaving.
Eliminating interleaved extentsYou can eliminate interleaved extents by reorganizing the tables with the UNLOAD and LOAD statements, creating or altering an index to cluster, or using the ALTER TABLE statement.

Eliminating interleaved extents

You can eliminate interleaved extents by reorganizing the tables with the UNLOAD and LOAD statements, creating or altering an index to cluster, or using the ALTER TABLE statement.