<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 13 Aug 2015, at 15:21, Pablo Sanchez <<a href="mailto:pablo@blueoakdb.com" class="">pablo@blueoakdb.com</a>> wrote:</div><div class=""><br class="">On 08/13/2015 09:18 AM, Michael Renner wrote:<br class=""><blockquote type="cite" class=""><br class="">Thank you very much, that worked fine!<br class=""><br class="">In a synthetic test with 1000 children and ~30 connections per<br class="">second this lowered the amount of context switches from ~38.000/sec to<br class="">~1.000/sec.<br class=""><br class=""></blockquote><br class="">Hey Michael,<br class=""><br class="">Do you have any /sar -u 3 XXX/ data showing CPU usage between /before/<br class="">and /after/?<br class=""></div></blockquote></div><br class=""><div class="">No, not more than the vmstat output in my initial mail: <a href="http://nopaste.narf.at/show/25531/" class="">http://nopaste.narf.at/show/25531/</a>. And those values are quite dependent on the environment you’re running, so I find them not very interesting to compare.</div><div class=""><br class=""></div><div class="">You can easily reproduce the behaviour by running pgpool with a few hundred to thousands of pgpool children and a rate of 50-100 new connections per second.</div><div class=""><br class=""></div><div class="">best,</div><div class="">Michael</div></body></html>