On Fri, Jul 12, 2013 at 5:30 PM, Tomas Pospisek <t...@sourcepole.ch> wrote:
> Am 11.07.2013 11:45, schrieb Mark Janssen: > > > I did see large amounts of sequential epoll_wait calls in the processes > > with 100% cpu load, and not with the other processes. > > > > epoll_wait(0, {}, 200, 0) = 0 > > (repeated 10-15 times) > > I've recently posted here [1] about haproxy staying at 100% CPU. The > cause of it probably was haproxy relentlessly trying but not succeeding > to make a connection to forward the traffic. > > Could this be a similar problem? I.e. that f.ex. your backend is > saturated and momentarily not accepting new connection while there are > new connections comming in to haproxy? I doublt is... we are seeing these peaks at quiet and at busy times, and no health-checks are failing. (We just switched to haproxy this month, replacing F5 BIGIP's we had earlier). The servers usually handle loads a lot higher then current traffic levels. Mark