Messages in this thread | | | Date | Tue, 24 Jul 2007 10:25:14 -0700 | From | Aaron Porter <> | Subject | miserable performance of 2.6.21 under network load |
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I'm in the process up upgrading a pool of apache servers from 2.6.17.8 to 2.6.21.5, and we're seeing a pretty major change in behavior. Under identical network load, 2.6.21 has a load average more than 3 times higher, cpu 0 spends well over 90% of its time in interrupts (vs ~30% under 2.6.17). When we hit 3k apache sessions, ksoftirqd eats 100% of cpu0 and our network traffic drops off rapidly. The end result is that 2.6.17 performs twice as well under this load. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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