Informix documentation for oncheck command does not explain clearly that this command should be run only during a maintenance window or during an off-hours period because the oncheck utility places a shared lock on system catalog tables when the database is checked and that the shared lock prevents any other updates, inserts, or deletes on the database until the check has completed. Various aspects of this information are found on a variety of sources of IBM documentation, but the information is not expressed clearly on the page that is intended to describe this command. I had to ask Informix Support multiple questions before I could get the answer I needed. Previously I had the oncheck command running on our production machine on Sundays, but even then it would sometimes cause problems for other production applications that were running on that day.
|Who would benefit from this IDEA?||Everyone who thinks they should run the oncheck command.|
How should it work?
Informix documentation for oncheck command should say that this command should be run during a maintenance window or during an off-hours period because the oncheck utility places a shared lock on system catalog tables when the database is checked and that the shared lock prevents any other updates, inserts, or deletes on the database until the check has completed. Better yet, fix the oncheck command so that it can be run during regular business hours without adversely affecting applications.
|Priority Justification||Running oncheck during business hours causes applications to fail.|
|Client Name||John Dargan, Clerk of Court, Volusia County, Florida|
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