Hi! thanks for replying :) I agree that transactions shouldn't be timing out, the problem happens when we do a database dump, this locks all the tables for a while and it happens once a day.
I think I'll go fix it at the source rather than handling it in the code - i.e. find another way of dumping the database which doesn't take so long and / or increase the timeout on the mysql server... Cheers :) On Jul 2, 3:17 pm, Michael Bayer <[EMAIL PROTECTED]> wrote: > On Jul 2, 6:37 am, Geoff <[EMAIL PROTECTED]> wrote: > > > Hi, > > > I'm getting this exception: 'Lock wait timeout exceeded; try > > restarting transaction". > > you shouldn't have transactions locking for so long that you're > getting such an error. meaning, try not to have long-running > transactions open. > > > > > I've looked through the docs and can't see if there is a way to get SA > > to retry itself rather than having to catch this exception and retry. > > no, if you wanted to "retry" this is something youd have to do in your > own application code. SA does not store a "history" of every > statement it issues within a transaction (not to mention all the > dependent operations around its statements) nor would it ever want to > assume such behavior....since the error youre getting is generally > considered to be a failure despite its optimistic "try again" message. > > if you really want to build around a "long running transactions" model > where "timeout" errors are expected, youd have to build a layer of > "heres the things i just did, now im doing them again" within your > application. > > note that im not even sure every database even allows transaction > locks to timeout. my experience with oracle and MS-SQL is that locks > are infinite until cancelled/killed (since it allows an administrator > to log in and see whats deadlocked). --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
