Re[2]: [squid-users] No SWAPIN in store.log

> They probably weren't. I guess I didn't really explain properly. As far as
> I understand, squid's cache is made up of two parts, the memory cache and
> the disk cache. Objects that are being hit frequently live in the memory
> cache. Once their usage goes down, they're SWAPOUT-ed to the disk cache.
> If they become very busy and squid considers it worthwhile, the object
> will be SWAPIN-ed from the disk cache to the memory cache where they'll
> remain until it's time for another SWAPOUT.
>
> Sending the object to a client does not constitute a SWAPIN. Yes the
> object comes off disk into memory, but it isn't put into the memory cache.
> Therefore it isn't a SWAPIN.
>

Actually, as I understand it squid currently has no way of doing a swapin
from disk to memory - it relies on the OS filesystem cache.

Robin Garner
CRS Australia

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