On 8/25/2016 9:58 AM, Theron Luhn wrote:
> I do not remember exact formula, but it should be something like “work_mem*max_connections + shared_buffers” and it should be around 80% of your machine RAM (minus RAM used by other processes and kernel). It will save you from OOM.
a single query can use multiple work_mem's if its got subqueries, joins, etc.
My Postgres is configured with *very* conservative values. work_mem (4MB) * max_connections (100) + shared buffers (512MB) = ~1GB, yet Postgres managed to fill up a 4GB server. I'm seeing workers consuming hundreds of MBs of memory (and not releasing any of it until the connection closes), despite work_mem being 4MB.
are you doing queries that return large data sets? -- john r pierce, recycling bits in santa cruz -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
