2011/8/18 Chen Bangzhong <[email protected]>:
> My cached objects will expire after 10 minutes.
>
> Cache-Control:max-age=600

Static content like pictures should cache longer, like 1 day, 86400.

> I don't know why there are so many disk writes and there are so many
> objects on disk.
>
> In addtion, Disk hits as % of hit requests: 5min: 1.6%, 60min: 1.9%
> is very low.

Maybe cause by disk read timeout. You used too much disk space, you
can shrink it a little by a little, until disk busy percentage reduced
to 80% or lower.

> Can I increase the cache_mem? or not use disk cache at all?

I used all memory I can use :-)

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