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B.4.2.18 Table-Corruption Issues

If you have started mysqld with --myisam-recover-options, MySQL automatically checks and tries to repair MyISAM tables if they are marked as 'not closed properly' or 'crashed'. If this happens, MySQL writes an entry in the hostname.err file 'Warning: Checking table ...' which is followed by Warning: Repairing table if the table needs to be repaired. If you get a lot of these errors, without mysqld having died unexpectedly just before, then something is wrong and needs to be investigated further.

When the server detects MyISAM table corruption, it writes additional information to the error log, such as the name and line number of the source file, and the list of threads accessing the table. Example: Got an error from thread_id=1, mi_dynrec.c:368. This is useful information to include in bug reports.

See also Section 5.1.7, “Server Command Options”, and Section 29.5.1.7, “Making a Test Case If You Experience Table Corruption”.


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Document created the 26/06/2006, last modified the 26/10/2018
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