Hi Brian,
I would suggest you to use mk-archiver (Maatkit Tools) for this activity.
http://www.percona.com/files/presentations/Make_Life_Easier_Maatkit_v2.pdf
Regards,
Krishna
On Fri, Jun 4, 2010 at 8:40 PM, Brian Dunning <brian@stripped>wrote:
> Hey all -
>
> I have a table with 12,000,000 records spread over about 6 years. I'm
> trying to delete all but the last 2 years, but no matter how small of a
> group I try to delete at a time, it keeps hanging up the server and I
> eventually have to restart MySQL. The table looks like this:
>
> `creation` timestamp NOT NULL default CURRENT_TIMESTAMP on update
> CURRENT_TIMESTAMP,
> `lat` double NOT NULL default '0',
> `lon` double NOT NULL default '0',
> `referer` int(12) NOT NULL default '0',
> PRIMARY KEY (`referer`,`lat`,`lon`),
> KEY `creation` (`creation`,`referer`)
>
> And the query I've been trying looks like this:
>
> delete from tablename where `creation` < '2006-04-01 00:00:00'
>
> ...trying to do the oldest 1 month of records at a time. So am I just
> trying a really inefficient query? Is there a better way to do this?
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