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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.
Queries and the query optimizerThese topics describe query plans, explain how the database server manages query optimization, and discuss factors that you can use to influence the query plan. These topics also describe performance considerations for SPL routines, the UDR cache, and triggers.
Optimization when SQL is within an SPL routineIf an SPL routine contains SQL statements, the database server optimizes and executes the SQL within the SPL routine.
SPL routine executable format stored in UDR cacheThe first time that a user executes an SPL routine, the database server stores the executable format and any query plans in the UDR cache in the virtual portion of shared memory.

SPL routine executable format stored in UDR cache

The first time that a user executes an SPL routine, the database server stores the executable format and any query plans in the UDR cache in the virtual portion of shared memory.

When another user executes an SPL routine, the database server first checks the UDR cache. SPL execution performance improves when the database server can execute the SPL routine from the UDR cache. The UDR cache also stores UDRs, user-defined aggregates, and extended data types definitions.