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On Fri, 27 Oct 2000, Joe Cooper wrote:
> An API for detecting load within the real server and reporting it to the
> director is a good idea. The only problem is that it isn't quite as
> simple a solution as it sounds.
>
> In the case of Squid (our current topic for discussion), it's very
> difficult to ascertain what the load is like. Yes, you can monitor the
> CPU usage, but a cache can be running at 0% idle and still effectively
> serve requests, as long as the disks are keeping up. In fact, most of
> our boxes run with only about 5-10% idle CPU _all_ the time, even when
> not under very heavy load. It is a quirk of the current async i/o
> implementation. All the disk threads eat a lot of CPU even when not
> being pushed hard.
Can't Squid determine its own load? The application program is the only
one that can determin it's actual load. If we develope a clean API it can
be incorporated into the most popular applications (apache module anyone?)
-Matt
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Matthew S. Crocker
Vice President / Internet Division Email: matthew@xxxxxxxxxxx
Crocker Communications Phone: (413) 587-3350
PO BOX 710 Fax: (413) 587-3352
Greenfield, MA 01302-0710 http://www.crocker.com
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