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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.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
Disk, memory, and process management
Shared memoryThese topics describe the content of database server shared memory, the factors that determine the sizes of shared-memory areas, and how data moves into and out of shared memory.
Virtual portion of shared memoryThe virtual portion of shared memory is expandable by the database server and can be paged out to disk by the operating system.
Data-distribution cacheThe database server uses distribution statistics generated by the UPDATE STATISTICS statement in the MEDIUM or HIGH mode to determine the query plan with the lowest cost.
SQL statement cacheThe SQL statement cache reduces memory usage and preparation time for queries.

SQL statement cache

The SQL statement cache reduces memory usage and preparation time for queries.

The database server uses the SQL statement cache to store optimized SQL statements that a user runs. When users run a statement that is stored in the SQL statement cache, the database server does not optimize the statement again, so performance improves.

For more information, see Set SQL statement cache parameters. For details on how these parameters affect the performance of the SQL statement cache, see the HCL OneDB™ Performance Guide.

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