Re: [AMaViS-user] Disk usage UP during nightly cleanup

Paolo Cravero as2594 wrote:

Gents,
here's the result.

> OPTIMIZE TABLE msgs, msgrcpt, maddr, quarantine;

> The man page http://dev.mysql.com/doc/refman/4.1/...ize-table.html
> does not mention anything about disk space requirements (it is in a
> comment instead) or slow-query behavior.

I let the nightly cleanup script run without OPTIMIZE TABLE at the end.
MySQL disk usage did NOT double, so be careful when running the OPTIMIZE
TABLE statement: you need as much free disk as your quarantine DB (minus
deleted items).

OTOH disk usage did not decrease of the usual 1-2%, so now I'll monitor
"SHOW TABLE STATUS" output for "InnoDB free" values. The DB engine
should reuse free space.

I confirm that OPTIMIZE TABLE is NOT logged to MySQL slow-queries.log.

Paolo


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