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<div class="moz-cite-prefix">Il 14/04/2017 21:06, Igor Neyman ha
scritto:<br>
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<p class="MsoNormal"><b><span
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Moreno Andreo [<a class="moz-txt-link-freetext" href="mailto:moreno(dot)andreo(at)evolu-s(dot)it">mailto:moreno(dot)andreo(at)evolu-s(dot)it</a>]
<br>
<b>Sent:</b> Friday, April 14, 2017 3:00 PM<br>
<b>To:</b> Igor Neyman <a class="moz-txt-link-rfc2396E" href="mailto:ineyman(at)perceptron(dot)com"><ineyman(at)perceptron(dot)com></a>;
Melvin Davidson <a class="moz-txt-link-rfc2396E" href="mailto:melvin6925(at)gmail(dot)com"><melvin6925(at)gmail(dot)com></a><br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:pgsql-general(at)postgresql(dot)org">pgsql-general(at)postgresql(dot)org</a><br>
<b>Subject:</b> Re: [GENERAL] Service outage: each
postgres process use the exact amount of the configured
work_mem<o:p></o:p></span></p>
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<p class="MsoNormal">Il 14/04/2017 20:40, Igor Neyman ha
scritto:<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">E. How many users were connected
when the problem occurred?<o:p></o:p></p>
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<p class="MsoNormal">About 350 connections<br>
<br>
Thanks<br>
<br>
<span style="color:#1F497D">______________________________________________________________________________________</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Probably
that is your problem, if you don’t have connection
pooler.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I’d
recommend to start with PgBouncer, very light-weight and
easy to configure.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Regards,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Igor
Neyman</span><o:p></o:p></p>
<p> <o:p></o:p></p>
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<p>I'm building such a system, but I don't think that's the
problem because now, with 30 active connections, it still
does not work (actually it's extremely slow).<o:p></o:p></p>
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<p style="border:none;padding:0in">Both servers are far from
being under heavy load (so they were before...)<o:p></o:p></p>
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<p><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Having
total of 350 connections and only 30 of them being active,
is the exact case where connection pooler helps.<o:p></o:p></span></p>
<p><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Igor
Neyman<o:p></o:p></span></p>
<br>
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</blockquote>
Sorry, I misexplained.<br>
4 hours ago we were in rush hour and the server was running with its
usual load (graphs do not show spikes in server load), and we had
about 350 connections.<br>
To troubleshoot the whole thing, I needed to restart the servers, in
the meantime customers disconnected.<br>
Now I have 30 of them (most of them alive), select * from
pg_stat_activity shows 30 connections.<br>
That's why I don't think it's a connection # problem.<br>
<br>
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