On Wed, Jul 9, 2008 at 12:47 PM, Brian Dunning <[EMAIL PROTECTED]> wrote: > Can someone spot a way to improve the performance of this query? I see that > every time it runs, it's "Copying to tmp table" and then "Creating sort > index" and taking way too long.
You're sorting by a computed field. That's why it has to make the temp table. Either you can use a denormalized approach where you pre-compute popcount, or you can just try to get it as fast as possible before sorting and live with the sort hit. If it's already fast without the sort, I think you'll have to pre-compute. - Perrin -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
