> Do you guys think that it would be useful to get somebody to benchmark how
> much overhead our cache introduces?  Doing this much worse with the cache
> enabled is bad IMO.  A simple first step would be for somebody to submit
> Talos runs on a try server job with the disk (and maybe mem) cache disabled
> and compare some numbers...

Yes, Nick has been running those numbers (Talos needs tweaking as its default cache access pattern is not a useful benchmark--virtually no reuse within a single run). On the hardware tested at least, the disk cache is a win, i.e. we don't want to turn it off, but the bug Taras points to definitely shows there are exceptions (encrypted partitions, very slow drives, etc.)/

Jason

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