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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 Informix® database servers.
Performance GuideThe Informix® Performance Guide describes how to configure and operate your HCL Informix® 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.
Estimating table sizeYou can calculate the approximate sizes (in disk pages) of tables.
Estimating data pagesHow you estimate the data pages of a table depends on whether that table contains fixed-length or variable-length rows.
Selecting an intermediate value for the size of the tableThe actual table size should fall somewhere between the projected number of data pages (projsize) and the maximum number of data pages (maxsize).

Selecting an intermediate value for the size of the table

The actual table size should fall somewhere between the projected number of data pages (projsize) and the maximum number of data pages (maxsize).

Based on your knowledge of the data, choose a value within that range that seems most reasonable to you. The less familiar you are with the data, the more conservative (higher) your estimate should be.

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