i haven't had the pleasure yet of writing for sites that generate so many hits/sec that they'd update the max value of any table at exactly the same time.
i usually ask for the max value about 2 milliseconds before doing the insert. And if the insert fails, i can auto-retry via a wrapper function after sleep(rand(1,3)); I dare say i could work this way at facebook <g> (not that i really want to, happy with where i am) On Tue, Feb 2, 2010 at 11:46 PM, Ashley Sheridan <a...@ashleysheridan.co.uk>wrote: > On Tue, 2010-02-02 at 23:19 +0100, Rene Veerman wrote: > > function getMax($table, $field) > > > If I saw this sort of code I'd be appalled! It's possibly the worst way to > get the auto increment value. You won't notice it testing the site out on > your own, but all hell will break loose when you start getting a lot of > hits, and two people cause an auto increment at the same time! > > Thanks, > Ash > http://www.ashleysheridan.co.uk > > >
