Home
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.
Denormalize the data model to improve performanceYou might need to denormalize the data model to reduce overhead and optimize performance.
Expelling long stringsThe most bulky attributes are often character strings. To make the rows shorter, you can remove long strings from the entity table.
Convert a long string to a TEXT data type columnWhen a string fills half a disk page or more, consider converting it to a TEXT data type column in a separate blobspace.

Convert a long string to a TEXT data type column

When a string fills half a disk page or more, consider converting it to a TEXT data type column in a separate blobspace.

The column within the row page is only 56 bytes long, which allows more rows on a page than when you include a long string. However, the TEXT data type is not automatically compatible with existing programs. The application needed to fetch a TEXT value is a bit more complicated than the code for fetching a CHAR value into a program.