Re: psql 9.3 automatic recovery in progress

Andreo u got a good observation here.

I got a script that run every hour why?

Odoo got some issues with IDLE connections, if we don't check our current
psql connections after a while the system eat all connections and a lot of
them are IDLE and stop answering users, we create a script that runs every
hour, this is:

""" Script is used to kill database connection which are idle from last 15
minutes """
#!/usr/bin/env python
import psycopg2
import sys
import os
from os.path import join, expanduser
import subprocess, signal, psutil
import time

def get_conn():

conn_string = "host='localhost' dbname='template1' user='openerp'
password='s$p_p(at)r70'"

try:
# get a connection, if a connect cannot be made an exception will
be raised here
conn = psycopg2.connect(conn_string)
cursor = conn.cursor()
# print "successful Connection"
return cursor
except:
exceptionType, exceptionValue, exceptionTraceback = sys.exc_info()
sys.exit("Database connection failed!\n ->%s" % (exceptionValue))

def get_pid():

SQL="select pid, datname, usename from pg_stat_activity where usename =
'openerp' AND query_start < current_timestamp - INTERVAL '15' MINUTE;"
cursor = get_conn()
cursor.execute(SQL)
idle_record = cursor.fetchall()
print
"---------------------------------------------------------------------------------------------------"
print "Date:",time.strftime("%d/%m/%Y")
print "idle record list: ", idle_record
print
"---------------------------------------------------------------------------------------------------"
for pid in idle_record:
try:
# print "process details",pid
# os.system("kill -9 %s" % (int(pid[0]), ))
os.kill(int(pid[0]), signal.SIGKILL)
except OSError as ex:
continue

get_pid()

I will move this to run not every hour and see the reaction.

Is a easy move, about Tim, our current KVM server is good for me, see
picture please:

free
total used free shared buffers cached
Mem: 181764228 136200312 45563916 468 69904 734652
-/+ buffers/cache: 135395756 46368472
Swap: 261948 0 261948

I got other vm but they are on other raid setup.

Tim u mention that u recommend reduce memory pressure, u mean to lower down
my values like shared_buffers or increase memory?

Melvin I try that value before but my server cry, I will add more memory in
a few weeks.

Any comment I will appreciated, thanks.

On Mon, Oct 10, 2016 at 11:22 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Periko Support <pheriko(dot)support(at)gmail(dot)com> writes:
> > My current server has 82GB memory.
>
> You said this was running inside a VM, though --- maybe the VM is
> resource-constrained?
>
> In any case, turning off memory overcommit would be a good idea if
> you're not concerned about running anything but Postgres.
>
> regards, tom lane
>