Messages in this thread | | | Date | Sat, 8 May 1999 16:48:40 -0700 (PDT) | From | Cacophonix Gaul <> | Subject | Re: 2.2.7 fixes Apache problem? (Was: Re: 2.2.5 optimizations for web benchmarks?) |
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I'm not sure if I can say that 2.2.7 _fixes_ the apache problem or merely _masks_ it.
With 2.2.7, the tcp performance (to certain clients) has gone up quite a bit due to some tcp changes (initial snd_cwnd, etc.). In fact, it's gone up so much, that apache is no longer bottlenecked in my setup - I'm now constrained by disk I/O performance, since specweb loads (and filesets) are much higher than can be accomodated in memory.
In other words, in 2.2.5, I was able to get the apache performance collapse after pushing it beyond the limit. In 2.2.7, I haven't been able to push apache beyond the limit, at least not on my dual PII/450, 512 MB RAM system.
cheers, karthik
> http://bugs.apache.org/index/full/4268, saying:
> > I'm running some specweb tests on apache, and with the specific config file > > from the distribution, performance drastically drops after reaching > > high loads - and remains poor even after the specweb tests stop. > > This happened on kernel 2.2.5 with Apache 1.3.4 and 1.3.6. > > Fast forward two weeks to the present. He now reports: > > The mystery continues. I got round to trying out 1.3.6 again this evening, > > this time on 2.2.7. I did _not_ see the performance drop off. Just to > verify, > > I rechecked on the stock 2.2.5 kernel, and the drop off is there. > > > > So _something_ has been fixed between 2.2.5 and 2.2.7 that has made this > problem > > go away. I'll keep plugging away as I get spare time to see if I can get > the > > problem to occur. > > Makes one want to repeat Mindcraft's Apache benchmark with 2.2.7, > doesn't it? > - Dan > > http://www.kegel.com/mindcraft_redux.html
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