"Gnanakumar" <gnanam@xxxxxxxxxx> wrote: > I've already thought of converting this into a document and keep > it handy so that I may want to refer back whenever I need. I've put up a first cut at such a document as a Wiki page: http://wiki.postgresql.org/wiki/Number_Of_Database_Connections Everyone should feel free to improve upon it. I'll probably add a "thought experiment" I've used a few times which seems to help some people understand the issue. >> A formula which has held up pretty well across a lot of >> benchmarks for years is that for optimal throughput the number of >> active connections should be somewhere near >> ((core_count * 2) + effective_spindle_count). > > Our entire Production application stack is setup in Amazon EC2 > cloud environment, that includes database server also. So, in > that case, how do I find out "effective_spindle_count"? I know > "core_count" can be determined from Amazon EC2 instance type. Per > Amazon EC2, EBS volumes are reportedly a shared resource. I think you need to experiment with different pools sizes. Please post results and/or update the Wiki page. -Kevin -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
