Dear Wolfgang,
I never used OpenVZ technology but I used VMware quite a lot.With VMware the adopted resource allocation policies are very important. If they are dynamic, the machine hasnt got its resources actually allocated to it till the machine uses them (e.g. to serve a request). And after a while it doesnt use these resources, they get released. This dynamic allocation of resources might explain the latency you are observing. If the resource allocation is static, then the latency due to the dynamic adjustments disappears. Of course all of this is happening at virtualization level and this is why the Aolserver configuration parameters might be not so relevant. Hope it helps, Maurizio From: Wolfgang Winkler [mailto:wolfgang.wink...@digital-concepts.com] Sent: 25 April 2013 08:17 To: aolserver-talk@lists.sourceforge.net Subject: Re: [AOLSERVER] futex problems Hi! The servers are running with the same configuration and I tried various maxconnections settings. ns_pools get default returns minthreads 60 maxthreads 200 idle 60 current 60 maxconns 0 queued 58366 timeout 1200 spread 20 I also tried with maxconns settings of 10000 and various other values. And I don't see the "exiting: exceeded max connections per thread" messages in the log. Regards, Wolfgang Am 2013-04-24 19:43, schrieb Jeff Rogers: Wolfgang Winkler wrote: Hi! We have a couple of servers running as openvz guests and on bare metal. Some of them are much slower due to a high latency when calling even very small pages. The strace output (see below) suggests, that the interpreters are initialized on each call. Are the two sets of servers running with the same configuration, in particular the "maxconnections" setting in the ns/servers/$servername section? -J There have been problems in some kernels with leap seconds, so we followed the advice found on the web and updated the kernels. The problem is still there. On one machine I've compiled the latest AOLserver version from git, still with the same problem. Systems with these kernel are working fine: Linux 2.6.32-238.9.1.el5.028stab089.1 Linux 2.6.32-5-openvz-amd64 Systems with these not: Linux 2.6.32-5-openvz-amd64 Linux 2.6.26-1-amd64 -- Wolfgang Winkler Geschäftsführung wolfgang.wink...@digital-concepts.com <mailto:wolfgang.wink...@digital-concepts.com> mobil +43.699.19971172 dc:büro digital concepts Novak Winkler OG Software & Design Landstraße 68, 5. Stock, 4020 Linz www.digital-concepts.com <http://www.digital-concepts.com> tel +43.732.997117.72 tel +43.699.1997117.72 Firmenbuchnummer: 192003h Firmenbuchgericht: Landesgericht Linz PS: BESUCHEN SIE UNSERE NEUE SHOP INFO SEITE: www.shop-info.at <http://www.shop-info.at>
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