Paste EXPLAIN SELECT ... (your SELECT); from the mysql client.
> Hi!
>
> When I join 4 tables with about 3000 records in each mysql seems to work
> forever on "copying to tmp table".
>
> I wonder what that could be. I have enough free space in the tmp-dir and
> don't know what else could it be.
>
> The database-model is normalized and on another machine it takes
> me about 1
> second to get a response.
>
> The strange thing about it is, that it worked before.
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