On Fri, Apr 14, 2017 at 10:12 AM, Moreno Andreo <moreno.andreo@xxxxxxxxxx> wrote:
Hi all,
About 2 hours and half ago, suddenly (and on the late afternoon of the Easter Friday), customers reported failing connections to our server, or even very slow.
After a bit of checking (that also involved server reboot) I noticed (using top) that every process regarding postgres is using exactly the amout I configured as work_mem (3 GB). And AFAIK it's not good.
30085 postgres 20 0 3370048 156656 153876 S 6.7 0.3 0:00.20 postgres
29833 postgres 20 0 3370000 65260 62416 S 1.7 0.1 0:00.17 postgres
29632 postgres 20 0 3372468 11712 6028 S 0.7 0.0 0:00.60 postgres
They are all sharing the same shared_buffers (not work_mem), and that shared space is being listed for each one of them.
This is unlikely to be related to your current problems. Nothing shown in that output is alarming.
What can be happened?
What error messages are the customers getting when they fail to connect? What error messages are showing up in the server log file? What do you see in pg_stat_actvity?
Cheers,
Jeff
