Thor Lancelot Simon <[email protected]> writes: > On Tue, Mar 19, 2013 at 06:55:54PM -0400, Greg Troxel wrote: >> >> Thor Lancelot Simon <[email protected]> writes: >> >> > I think pools should be (slightly) leaky buckets. >> >> So do you mean that pools should free a page every so often if it's >> available, so that a pool's usage of unallocated pages decays as >> e^-(t/60s), or something like that? > > Yes. Just like that. I think it might keep a number of common > cyclical workloads from becoming pathological so that they end > up trying to aggressively drain.
I think it's a reasonable suggestion for experimentation. It's an open question whether it will be more efficient overall, since draining without pressure will lead to less object reuse. I don't think you meant to suggest that this should be the only mechanism; it seems that pressure will arise (due to workloads) and thus the drain stuff needs to be right regardless.
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