RE: Default cache_hot_time value back to 10ms

[Chen, Kenneth W]

Andrew Morton wrote on Tuesday, October 05, 2004 9:51 PM
> > Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:
> >  I'd say it is probably too low level to be a useful tunable (although
> >  for testing I guess so... but then you could have *lots* of parameters
> >  tunable).
>
> This tunable caused an 11% performance difference in (I assume) TPCx.
> That's a big deal, and people will want to diddle it.
>
> If one number works optimally for all machines and workloads then fine.
>
> But yes, avoiding a tunable would be nice, but we need a tunable to work
> out whether we can avoid making it tunable ;)
>
> Not that I'm soliciting patches or anything.  I'll duck this one for now.

Andrew, can I safely interpret this response as you are OK with having
cache_hot_time set to 10 ms for now?  And you will merge this change for
2.6.9?  I think Ingo and Nick are both OK with that change as well. Thanks.

- Ken


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