At 12:05 -0500 9/20/02, Naushit Sakarvadia wrote: >I have question about mysqld theading. > >I understand that mysqld will have one thread per connection, is that >right?? > > If thru, Can I assign higher priority to perticular >thread/connection/client ?
No. You can apply priority modifiers to individual statements, but you state below that is not what you want. > >for example , If we have two clients connected to mysqld using >Thread A and Thread B. ( they are using same DB same TABLE). > >I want to give higher priority to Thread A then Thread B. >By higher priority I mean if Thread B is doing something( >select/update/insert or anything), >and if there is some request on Thread A then it should preempt the Thread B >and it should get executed first, after Thread A releses resourse Thread B >should continue >from where it was left. > >I am NOT looking for SELECT over UPDATE priority > >Second Question. > >When I use "--low-priority-updates", Will it have priority between threads? Yes. It applies globally. >for example, if Thread B is doing UPDATE and Thread A want to do SELECT, >will Thread A >get priority over Thread B? Will it preempt Thread B? No. That is, if Thread B is *already* executing an UPDATE, Thread A can't have the server abort that UPDATE so that it can start executing its SELECT. Once a query starts, it runs to completion. > >Thanks >Naushit. > >Note: I am not subcribed to Mysql list , plase cc your reply to me . > --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
