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Posted by Dave on 10/03/67 11:16
Marcus (JumpMan222@aol.com) decided we needed to hear...
> Hello,
>
> I recently converted all my existing MyISAM tables to InnoDB tables
> through phpmyadmin. I noticed some strange behavior whenever I would
> refresh the screen, as phpmyadmin would report different numbers for the
> cardinality of the primary key (i.e. one minute it would say cardinality
> 388, then 244 on refresh, then something else), and it would report
> different values for the number of rows when mousing over the table
> names on the left menubar. This behavior only seems to exist on tables
> with a "larger" number of rows, and by larger I only mean ~100 or more
> rows (tables with fewer rows always report the correct number of rows).
>
> Whenever I do a SELECT *, I get the correct number of rows returned, so
> I know they are actually there.
>
> Has anyone ever experienced this or does anyone know what is up? Thanks.
>
This happens because row count is only an estimate for InnoDB tables
due to the storage format. For MyISAM on the other hand, MySQL
maintains an exact row count.
--
Dave <dave@REMOVEbundook.com>
(Remove REMOVE for email address)
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