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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.
Fragmentation guidelinesOne of the most frequent causes of poor performance in relational database systems is contention for data that resides on a single I/O device. Proper fragmentation of high-use tables can significantly reduce I/O contention. These topics discuss the performance considerations that are involved when you use table fragmentation.
Improve the performance of operations that attach and detach fragmentsWhen you use ALTER FRAGMENT ATTACH and DETACH statements to add or remove a large amount of data in a very large table, you can take steps to improve the performance of the ATTACH and DETACH operations.
Improving ALTER FRAGMENT ATTACH performanceYou can take advantage of the performance optimizations for the ALTER FRAGMENT ATTACH statement if your database meets certain requirements.
Distribution schemes for reusing indexesYou can use one of three distribution schemes that allow the attach operation of the ALTER FRAGMENT statement to reuse existing indexes.

Distribution schemes for reusing indexes

You can use one of three distribution schemes that allow the attach operation of the ALTER FRAGMENT statement to reuse existing indexes.

These distributions schemes are:

Fragmenting the index in the same way as the table
Fragmenting the index with the same set of fragment expressions as the table
Attaching unfragmented tables to form a fragmented table

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