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
What can be happened?
Nothing has been touched....
postgresql 9.5.6 on debian 8 just apt-get upgrade'd
Any help would be appreciated.
Moreno.