> Is it normal to have Inact_target 1/4 of main memory (64MB of 256MB RAM)?
> In previous versions, this value would fluctuate with the load of the system.
>
> Is this expected?
Yes, this is a 'compensation' for the fact that page aging changed
from exponential to linear. The combination of linear page aging
with a large inactive_target results in a good combination of
frequency- and recency-based page eviction.
Doing just linear page aging with a small inactive target resulted
in worse throughput than exponential page aging for some workloads,
better for other workloads. Linear page aging with a large inactive
target results in good througput and latency under all workloads I've
found up to now. As usual, thanks go out to Matt Dillon for finding
this balancing point.
I guess it really is time to stop reinventing the wheel ;)
cheers,
Rik
-- IA64: a worthy successor to i860.http://www.surriel.com/ http://distro.conectiva.com/
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