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Improve performance of SET INTEGRITY command through use of (intra partition) parallelism

SET INTEGRITY does currently not make use of intrapartition parallelism.

SET INTEGRITY (with "checked" option) for large tables and/or tables with many foreign key and/or check constraints consumes a large amount of time while the table is not accessable.

We have very large tables (> 10 billion rows) in a non DPF environment with some RI constraints. Especially for one of those big tables it takes about 13-22 hours to complete. As there are further tables having dependencies on it, the whole run for the database takes about 2 days.

Our db server has more than 90 CPU cores. Without parallelism SET INTEGRITY may not use available system ressources effectively.

  • Avatar32.5fb70cce7410889e661286fd7f1897de Guest
  • Jun 15 2020
  • Future consideration
Who would benefit from this IDEA? every customer with RI constraints; SET INTEGRTIY after load operations occur quite often. A good performance of SET INTEGRITY is important to minimize times during tables are not accessable.
How should it work?

SET INTEGRITY should use the configured intrapartition parallelism or accept and optional parameter to configure parallelism in the command itself.

Idea Priority Urgent
Priority Justification huge OLTP databases with many RI constraints and nearly 24/7 availability requirements need RI checking within a short time frame.
Customer Name Allianz Technology SE
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