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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.
Placing tables on diskTables that the database server supports reside on one or more portions of one or more disks. You control the placement of a table on disk when you create it by assigning it to a dbspace.
Using multiple disksYou can use multiple disks for dbspaces, logical logs, temporary tables, and sort files.
Spreading temporary tables and sort files across multiple disksYou can spread the I/O associated with temporary tables and sort files across multiple disks, after defining dbspaces for temporary tables and sort files. This can improve performance for applications that require a large amount of temporary space for temporary tables or large sort operations.

Spreading temporary tables and sort files across multiple disks

You can spread the I/O associated with temporary tables and sort files across multiple disks, after defining dbspaces for temporary tables and sort files. This can improve performance for applications that require a large amount of temporary space for temporary tables or large sort operations.

To define several dbspaces for temporary tables and sort files, use onspaces -t. When you place these dbspaces on different disks and list them in the DBSPACETEMP configuration parameter, you spread the I/O associated with temporary tables and sort files across multiple disks, as Dbspaces for temporary tables and sort files illustrates. You can list dbspaces that contain regular tables in DBSPACETEMP.

This figure is described in the surrounding text. — Figure 1: Dbspaces for temporary tables and sort files

Users can specify their own lists of dbspaces for temporary tables and sort files with the DBSPACETEMP environment variable. For details, see Configure dbspaces for temporary tables and sort files.