On Thu, 20 Dec 2018 at 14:35, Pavel Stehule <pavel.stehule@xxxxxxxxx> wrote:
čt 20. 12. 2018 v 2:41 odesílatel Ron <ronljohnsonjr@xxxxxxxxx> napsal:On 12/19/18 7:27 PM, Michael Paquier wrote:
[snip]
> Each backend stores its own copy of the relation cache, so if you have
> idle connections which have been used for other work in the past then
> the memory of those caches is still around. Idle connections also have
> a CPU cost in Postgres when building snapshots for example, and their
> entries need to be scanned from a wider array, but usually the relation
> cache bloat is a wider problem.
So it's best to kill connections that have been idle for a while?sure - one hour idle connection is too old.
I'd also assess closing the connection from the client end once its task is done - that would reduce the number of idle connections in the first place.
