[users@httpd] WebServer slower after turned on KeepAlive

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On 8/13/06, Qingshan Xie <xieq_49@xxxxxxxxx> wrote:
--- Joshua Slive <joshua@xxxxxxxx> wrote:
......
> Having a portion of children hanging out in
keepalive
> could hurt even if there are children free, because
> it could cause more context switches/memory cache
> misses when switching requests between children.

I don't fully understand what you explained above.
Could you explain more?

Having a bunch of unused processes hanging around could make it less
likely to hit a process that is pre-loaded in the processor cache, and
more likely to hit a process that has been swapped to disk-based mem
cache.  The first issue should be relatively minor, but the second
could be quite major if you don't have enough physical ram.

Joshua.

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