RE: Kernel 2.2.9 fails to handle load.

Ricardo Galli Granada (gallir@atlas-iap.es)
Fri, 4 Jun 1999 02:07:57 +0200 (MEST)

> The single biggest hardware issue affecting webserver performance is
RAM. A
> webserver should never ever have to swap, swapping increases the latency
of
> each request beyond a point that users consider "fast enough". This
causes users
> to hit stop and reload, further increasing the load. You can, and
should,
> control the MaxClients setting so that your server does not spawn so
many
> children it starts swapping.

2.2.9 is really bad for running apache and other buffer-consuming
programs.

Try:

% cat some_large_file_that_does_not_fit_in_RAM > /dev/null

and you will see your apache daemons swapped out. It depends more on
buffering than in MaxClients.

The behaviour in 2.2.7 was much better for this case. I already reported
it days ago.

--
Ricardo Galli






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