On Fri, July 20, 2007 12:32, Andrew Rosolino said:
> Whenever I alter a mysql table like add a new field it gets really slow
> all other processes lag.
> Is there a memory variable I can adjust for this?
> View this message in context:
Without more information it might be hard to answer. A general though:
Alter Table causes the entire table to be re-created in its new form and
then the old one deleted and the new one renamed. For a large table that
is a significant bit of work (cpu, disk and memory). It might help if
you could give the size of the table and what the alter involved (for
example generating a new index would take even more time).
William R. Mussatto