<div dir="ltr">And I believe even a dedicated quick HHD wouldnt hurt to access Postgres.<div>Will ask IT to make these long due changes and then update this thread.</div><div>As always, thanks a lot.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Aug 26, 2016 at 1:25 PM, Pierre Tardy <span dir="ltr"><<a href="mailto:tardyp@gmail.com" target="_blank">tardyp@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><br></div>The ram looks like sufficient, it might be a good test to try and increase the number of cpu for that VM.<div>In your trace, I can see the use of up to 7 threads at the same time, so you might gain by going 8 CPUs</div><div><br></div><div>Also, make sure that your VM host is not overbooked. In my experience of using VMware VMs provided by IT, overbooking has been a source of inexplicable performance issues.</div><div><br></div><div>12k lines is a lot, but buildbot shall support this kind of load without issue.</div></div><div class="HOEnZb"><div class="h5"><br><div class="gmail_quote"><div dir="ltr">Le ven. 26 août 2016 à 12:05, Francesco Di Mizio <<a href="mailto:francescodimizio@gmail.com" target="_blank">francescodimizio@gmail.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">It's a vmware virtual machine with 4 GIGs RAM and 4 CPUs@3Ghz. It runs, among other marginal things, 2 docker containers - one for the buildbot and one for the postgres db.<div><br></div><div>The most beefy logs have around 12K lines. Is it too much?</div><div>Also some other logs are read from the worker's filesystem and added as additional logs.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Aug 26, 2016 at 11:51 AM, Pierre Tardy <span dir="ltr"><<a href="mailto:tardyp@gmail.com" target="_blank">tardyp@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Cool!<div>I can indeed see 3 spikes.</div><div><br></div><div>Looks related to logs and logs compression.</div><div><br></div><div>What is the HW spec of your master machine?</div><div>How much log does your build generate?</div><span><font color="#888888"><div><br></div><div>Pierre</div></font></span></div><div><div><br><div class="gmail_quote"><div dir="ltr">Le ven. 26 août 2016 à 11:42, Francesco Di Mizio <<a href="mailto:francescodimizio@gmail.com" target="_blank">francescodimizio@gmail.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Pierre,<div><br></div><div>I enabled it, waited 1 min and saw the spike, then stopped after a few secs. Attached the json.</div><div>Awesome tool btw, work wonders!</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 25, 2016 at 1:14 PM, Pierre Tardy <span dir="ltr"><<a href="mailto:tardyp@gmail.com" target="_blank">tardyp@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">You can try to hit the button in the morning with a two hours gather period, and hope that you see the spike during that period..<div><br></div></div><div><div><br><div class="gmail_quote"><div dir="ltr">Le jeu. 25 août 2016 à 12:17, Francesco Di Mizio <<a href="mailto:francescodimizio@gmail.com" target="_blank">francescodimizio@gmail.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thanks a lot! Pierre I will def will give it a shot. I am not sure I'll be able to smash that 'start recording' button as the UI isusuallystuck when the CPU spikes. Updates to come!</div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 25, 2016 at 10:45 AM, Pierre Tardy <span dir="ltr"><<a href="mailto:tardyp@gmail.com" target="_blank">tardyp@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Francesco,<div><br></div><div>I spent some time in order to implement a profiler plugin for buildbot</div><div><br></div><div>You can give it a look, and send your profile.json file if you need more analysis from me.</div><div><div><a href="https://github.com/tardyp/buildbot_profiler" target="_blank">https://github.com/tardyp/<wbr>buildbot_profiler</a><br></div><div><br></div><div>Regards,</div><div>Pierre</div><br></div></div><div><div><br><div class="gmail_quote"><div dir="ltr">Le mer. 24 août 2016 à 22:43, Francesco Di Mizio <<a href="mailto:francescodimizio@gmail.com" target="_blank">francescodimizio@gmail.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I've tried and it's not an easy task because of my Win into Vagrant into Docker setup. <div>I'll try again soon when I get a Linux box!</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Aug 19, 2016 at 5:54 PM, Vasily <span dir="ltr"><<a href="mailto:just.one.man@yandex.ru" target="_blank">just.one.man@yandex.ru</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Umm, no. VTune has Python support starting 2017 Beta, and, well, it was my team (at Intel) work actually :-)</p>
<p dir="ltr">P.S. I'm from Intel, too. </p>
<p dir="ltr">Thanks, <br>
Vasily</p>
<div class="gmail_quote">19 авг. 2016 г. 18:17 пользователь "Francesco Di Mizio" <<a href="mailto:francescodimizio@gmail.com" target="_blank">francescodimizio@gmail.com</a>> написал:<div><div><br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">I had thought you were making fun of Intel somehow ;)</p>
<div class="gmail_extra"><br><div class="gmail_quote">On Aug 19, 2016 5:07 PM, "Pierre Tardy" <<a href="mailto:tardyp@gmail.com" target="_blank">tardyp@gmail.com</a>> wrote:<br type="attribution"><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">ahah<div><br></div><div>I though this was a taunt on me being employed by Intel.</div><div>I actually had mitigated experience with vtune few years ago, and didn't know they had python support until then.</div><div>Being an opensource guy, I usually neglegate to look at proprietary stuff.</div><font color="#888888"><div><br></div><div>Pierre</div></font></div><div><br><div class="gmail_quote"><div dir="ltr">Le ven. 19 août 2016 à 12:18, Vasily <<a href="mailto:just.one.man@yandex.ru" target="_blank">just.one.man@yandex.ru</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">I'm again suggesting to look into Python profiling capabilities of Intel® VTune™ Amplifier. It could run statistical profiling for a long time and display CPU usage over time, so the developer can look at specific time range where CPU usage was too high and see which functions were executed. </p>
<p dir="ltr">Thanks, <br>
Vasily</p>
<div class="gmail_quote">19 авг. 2016 г. 11:57 пользователь "Pierre Tardy" <<a href="mailto:tardyp@gmail.com" target="_blank">tardyp@gmail.com</a>> написал:</div><div class="gmail_quote"><br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Francesco,<div><br></div><div>Your described setup looks sane to me.</div><div><br></div><div>The problems we are trying to catch are cpu spikes, as far as I understand, which does not happen for very long, but are very annoying for users, as it is blocking the reactor.</div><div><br></div><div>This problem is not easy to see in the profile you sent, as this profile is over long time, so we see the average of each method during the day and not the spikes.</div><div><br></div><div>What would really be needed is a on-demand profiler which would detect cpu spikes and only log the stack traces during those times.</div><div><br></div><div>Here is a nice blog pst explaining why statistic profiling is cool and easy to implement in python.</div><div><a href="https://nylas.com/blog/performance" target="_blank">https://nylas.com/blog/<wbr>performance</a><br></div><div><br></div><div>For 0.9.1 I want to concentrate on scalability, and write a debugging ui plugin based on those ideas (and probably code)</div><div><br></div><div>That would be great if your team can help on that matter.</div><div><br></div><div>Regards,</div><div>Pierre</div></div>
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