Re: patch: improve SLRU replacement algorithm

From: Greg Stark <stark(at)mit(dot)edu>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: patch: improve SLRU replacement algorithm
Date: 2012-04-05 13:29:22
Message-ID: CAM-w4HONN6izHgeSt_6=8jbND1QhFP6E1OO7ODJVcv_vZT13Dw@mail.gmail.com
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On Thu, Apr 5, 2012 at 2:24 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> Sorry, I don't understand specifically what you're looking for.  I
> provided latency percentiles in the last email; what else do you want?

I think he wants how many waits were there that were between 0 and 1s
how many between 1s and 2s, etc. Mathematically it's equivalent but I
also have trouble visualizing just how much improvement is represented
by 90th percentile dropping from 1688 to 1620 (ms?)

--
greg

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