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Re: MYISAM Table Crash After Electricity Down
Posted by: Ingo Strüwing
Date: November 20, 2006 09:14AM

Hi.

You may have used the wrong forum. This forum is about MEMORY tables. It is obvious that they lose all their data on power down.

1. It is not necessary for correct operation to do daily maintenance on MyISAM tables. However it depends on the amount of INSERT, UPDATE, and DELETE on a table when it comes to most efficient SELECTS. The optimizer has better counts to work on if you ANALYZE a table after a bunch of changes. OPTIMIZE basically removes fragmentation from the table. It may improve performance after big changes.

2. Yes. In this case you can even lose data changes on MyISAM tables, not only corrupt the indexes.

Regards
Ingo

Ingo Strüwing, Senior Software Developer - Storage Engines
MySQL AB, www.mysql.com

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Re: MYISAM Table Crash After Electricity Down
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