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<p class="MsoNormal">We are running pgpool in our lab in a virtualized, dockerized environment with pgpool managing two streaming replicated Postgres nodes. I am running pgpool 3.5.0.1.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am using pgbench to connect through pgpool:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">/usr/pgsql-9.3/bin/pgbench -c 300 -r -j 5 -t 3334 -h pgpool -p 9999 dbname<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What is happening is I’m getting frequent disconnects of the pcp worker:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">2016-03-01 19:36:48: pid 5369: LOG: forked new pcp worker, pid=7377 socket=7<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:36:48: pid 5369: LOG: PCP process with pid: 7377 exit with SUCCESS.<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:36:48: pid 5369: LOG: PCP process with pid: 7377 exits with status 0<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:36:48: pid 244: LOG: reload config files.<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:36:48: pid 5370: LOG: reloading config file<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:37:00: pid 5369: LOG: forked new pcp worker, pid=7433 socket=7<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:37:00: pid 5369: LOG: PCP process with pid: 7433 exit with SUCCESS.<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:37:00: pid 5369: LOG: PCP process with pid: 7433 exits with status 0<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:37:00: pid 244: LOG: reload config files.<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:37:03: pid 5370: LOG: reloading config file<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Also, occasionally:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">2016-03-01 19:36:18: pid 4497: FATAL: Backend throw an error message<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:36:18: pid 4497: DETAIL: Exiting current session because of an error from backend<o:p></o:p></p>
<p class="MsoNormal">2016-03-01 19:36:18: pid 4497: HINT: BACKEND Error: "function pgpool_regclass(unknown) does not exist"<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This happened six times during the five-minute pgbench test.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am running with:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">num_init_children = 1000<o:p></o:p></p>
<p class="MsoNormal"> # Number of pools<o:p></o:p></p>
<p class="MsoNormal"> # (change requires restart)<o:p></o:p></p>
<p class="MsoNormal">max_pool = 1<o:p></o:p></p>
<p class="MsoNormal"> # Number of connections per pool<o:p></o:p></p>
<p class="MsoNormal"> # (change requires restart)<o:p></o:p></p>
<p class="MsoNormal">listen_backlog_multiplier = 3<o:p></o:p></p>
<p class="MsoNormal">serialize_accept = on<o:p></o:p></p>
<p class="MsoNormal">child_life_time = 0<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is this a problem with the pcp worker getting overwhelmed?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Looking at the new metrics on show pool_nodes I see that reads are being distributed.<o:p></o:p></p>
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