Comments - Waiting for table metadata lock - during parallel database loads
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could you elaborate please? what is "multiple database loads"? And how are they not allowed?
Hi,
What I mean by multiple database loads is running 2 or 20 database loads in parallel.
The script I have loads "x"databases in parallel (some I wrote to reload Sybase, Oracle and Informix database servers). The issue I have found is MySQL prevents any other ALTER statements from executing while another ALTER statement is in progress.
You don't specify, but perhaps you were running into locking issues when restoring from a mysqldump? See the mysqldump article for various settings.