We really need to hear from Sandy Walsh on this thread so he can elaborate on how the distributed scheduling works (with multiple mysql databases). Devin On Sep 26, 2011, at 6:41 AM, Soren Hansen wrote: > 2011/9/26 Pitucha, Stanislaw Izaak <stanislaw.pitucha at hp.com>: >> The pain starts when your max memory usage crosses what you have available. >> Check http://dev.mysql.com/doc/refman/5.1/en/memory-use.html - especially comments which calculate the needed memory for N connections for both innodb and isam. (mysqltuner.pl will also calculate that for you) >> >> Hundreds of connections should be ok. Thousands... you should rethink it ;) > > Hm.. It doesn't take many racks full of blade servers to get into 4 > digit numbers of compute nodes. Certainly fewer than I was expecting > to see in a garden variety Nova zone. > > -- > Soren Hansen | http://linux2go.dk/ > Ubuntu Developer | http://www.ubuntu.com/ > OpenStack Developer | http://www.openstack.org/ > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack at lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp