Re: Does idle sessions will consume more cpu and ram? If yes,how tocontrol them

čt 20. 12. 2018 v 2:41 odesílatel Ron <ronljohnsonjr@gmail.com> 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.