On Thursday, July 25, 2013 4:12:50 PM UTC-7, Klauss wrote: > > On Thu, Jul 25, 2013 at 7:58 PM, kris <kkvil...@gmail.com <javascript:>> > wrote: > > > > My postgres.conf has a parameter max_connections = 100 > > That's not only the default, but it's also not really recommended to > push it much higher, so only do so if you really need a big pool on > each machine, and if you're sure that pool will be mostly idle all of > the time. >
Hmm.. I just bumped it 200 and modified the shared_buffers to be 32MB > > I was led to believe the SA would manage pool of connections > > to some good default > > ( > http://docs.sqlalchemy.org/en/rel_0_7/core/pooling.html?highlight=connection%20pool), > > > > but couldn't find the default values? Just so I can relate the two > figures > > (SA Pool parameters and PG max_connections) > > pool_size, see create_engine[0], the default is 5 > > Thanks.. > > Also Is there a good way to get it too close some idle connections? > > Yes, decrease pool_size. Just how many workers do you have? With the > defaults, you'd need a little under 20 workers to start getting those > errors. > Here's the weird bit.. I have 2 remote machine and local access.. after some light usage I already see 9 Idle connections from the local machine and a few from the other machines. It may actually be that we are using uWSGI, each which has 8 workers configured, so really I have 24 workers already. > With that many workers, your only real solution is to install a > pgbouncer to manage those connections globally. SQLA cannot manage a > pool of connections across workers, only a shared pool (pgbouncer) can > do that. SQLA's pool is local to each process (worker). > Thanks for the help.. I will check out pgbouncer at this point. > [0] > http://docs.sqlalchemy.org/en/rel_0_7/core/engines.html#sqlalchemy.create_engine > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out.
