sounds like a scheduler issue did you try "deadline"? http://en.wikipedia.org/wiki/Deadline_scheduler
on Linux systems pass "elevator=deadline" as kernel param Am 12.10.2013 20:58, schrieb Chris McKeever: > We had a similar issue a bit back - and although it sounds similar - based > on your followups it probably isnt, but will just toss this out there > anyhows. We were experiencing connection timeouts when load would ramp up. > Doing some digging we learned that our firewall between the servers > bandwidth would get consumed by a large wordpress load - and this in > essence backed up the rest of the requests until they timed out. > > We fixed that load issue which reduced the data passing through and have > expereinced a significant performance boost in our app let alone reduction > of these timeout issues > > On Sat, Oct 12, 2013 at 12:56 PM, Reindl Harald <h.rei...@thelounge.net>wrote: > >> >> >> Am 12.10.2013 19:45, schrieb Jørn Dahl-Stamnes: >>> On Saturday 12 October 2013 17:36, Reindl Harald wrote: >>>> so someone did "optimize table" on a large table >>>> you do yourself not a favour restarting the server in such a moment >>> >>> 7 hours before the server was shut down, we did a alter table to add a >> primary >>> key to a table that is read-only from the web application. >> >> which means the table is most likely completly copied >> in a temp file and depending on the table size this >> takes time - you killed the alter table i guess >>
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