On Wed, May 25, 2011 at 10:58 PM, Craig Ringer <craig@xxxxxxxxxxxxxxxxxxxxx> wrote: > There might be a very cheap and simple way to help reduce the number of > people running into problems because they set massive max_connections values > that their server cannot cope with instead of using pooling. > > In the default postgresql.conf, change: > > max_connections = 100 # (change requires restart) > # Note: Increasing max_connections costs ~400 bytes of shared memory > # per connection slot, plus lock space (see max_locks_per_transaction). > > to: > > max_connections = 100 # (change requires restart) > # WARNING: If you're about to increase max_connections above 100, you > # should probably be using a connection pool instead. See: > # http://wiki.postgresql.org/max_connections > # > # Note: Increasing max_connections costs ~400 bytes of shared memory > # per connection slot, plus lock space (see max_locks_per_transaction). > # > > > ... where wiki.postgresql.org/max_connections (which doesn't yet exist) > explains the throughput costs of too many backends and the advantages of > configuring a connection pool instead. > > Sure, this somewhat contravenes the "users don't read - ever" principle, but > we can hope that _some_ people will read a comment immediately beside the > directive they're modifying. +1 on this idea, although I'm not so sure it's a good idea to point to the wiki. Also, all other .conf explanation is in the standard docs, so maybe this should be too. merlin -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
