The setup has been running for a few days now (still with nbproc 1) and is performing admirably. I'd say this issue is fixed/resolved.
Thanks! On Fri, Jul 19, 2013 at 9:58 PM, Mark Janssen <maniac...@gmail.com> wrote: > I've applied the patches and am running with the new version now. I'll let > it run overnight (with nbproc back at 1...). > I'll probably switch back to nbproc >1 in the morning, as traffic starts > ramping up. > > Mark > > > On Thu, Jul 18, 2013 at 10:42 PM, Willy Tarreau <w...@1wt.eu> wrote: > >> Hi Mark, >> >> OK I could reproduce, debug and fix. It was a tough one, really... >> More a problem of internal semantics than anything else, so I had >> to test several possibilities and study their impacts and the corner >> cases. In the end we get something that's fixed and better :-) >> >> The issue was mostly visible with pipelined keep-alive requests, >> but was still happening for tails of transfers that were less than >> 4kB, and delayed closes. These ones are much more common (about 1/4 >> of the transfers) but shorter so they remain unnoticed as they just >> result in a few more syscalls for a transfer, causing a slight CPU >> usage increase (I noticed 10% instead of 6% here with the fix). >> >> So I'm sending you 3 patches. The first one is the most important >> one, alone it must fix the issue. The second and third ones are >> the least important parts of the fix, but which should still be >> applied to save CPU usage in the low numbers. They can be seen as >> optimizations but alone they could have seriously addressed the >> issue as well, except a few corner cases. >> >> So please apply them all in sequence to your tree. They were made >> on latest -master, but they should apply to plain 1.5-dev19 as well. >> >> Oh and by the way, the bug was present since 1.5-dev12. >> >> Best regards, >> Willy >> >> > > > -- > Mark Janssen -- maniac(at)maniac.nl > Unix / Linux Open-Source and Internet Consultant > Maniac.nl Sig-IO.nl Vps.Stoned-IT.com > > -- Mark Janssen -- maniac(at)maniac.nl Unix / Linux Open-Source and Internet Consultant Maniac.nl Sig-IO.nl Vps.Stoned-IT.com
