We have the problems with 2.6.16 and 2.6.18 kernels... I'm not sure it is a kernel related problem...
Denis Il giorno 25/nov/2009, alle ore 11.46, Glyn Astill ha scritto: > --- On Tue, 24/11/09, Steven Crandell <[email protected]> wrote: >> I'm seeing this also with >> pgpool-II-2.2.5 running on ubuntu server, kernel 2.6.24. >> Given pgpool's handling method for connections over the >> num_init_children (queuing), I have to set num_init_children >> high enough to ensure children are never depleted (> >> 1000). >> >> When all those children respawn every $child_life_time >> seconds I see load spikes upwards of 60 >> >> That said, there does not appear to be any operational >> impact on the pgpool server, I am just seeing load spikes >> similar to what Aleksey mentioned turning my monitoring >> solution red multiple times a day. >> >> >> I would think that one work around would be to set >> child_max_connections sufficiently low that children respawn >> because they have reached child_max_connections rather than >> than child_life_time. If I'm understanding the >> situation correctly this would cause child respawns to >> happen more serially rather than all children respawning >> together every $child_life_time seconds. >> > > Hmm, the reason I asked about kernel version was that I started seeing these > spikes after going from 2.6.18 to 2.6.26, that's not to say more subtle > symptoms were not there before and I didn't notice. > > I'm jumping to conclusions that it could be CFS related, and that would make > sense for 2.6.24 too .... but I'm pretty much totally uninformed on that. > > > > > > _______________________________________________ > Pgpool-general mailing list > [email protected] > http://pgfoundry.org/mailman/listinfo/pgpool-general > _______________________________________________ Pgpool-general mailing list [email protected] http://pgfoundry.org/mailman/listinfo/pgpool-general
