| From: | "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> |
|---|---|
| To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> |
| Cc: | "Simon Riggs" <simon(at)2ndQuadrant(dot)com>, "Alvaro Herrera" <alvherre(at)commandprompt(dot)com>, "decibel" <decibel(at)decibel(dot)org>, "Heikki Linnakangas" <heikki(dot)linnakangas(at)enterprisedb(dot)com>, "Itagaki Takahiro" <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>, "pgsql-hackers" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: FSM search modes |
| Date: | 2009-10-01 22:17:20 |
| Message-ID: | 4AC4E420020000250002B590@gw.wicourts.gov |
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| Lists: | pgsql-hackers |
"Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> wrote:
> I think it would make sense to just start using this once you get
> into the last half or quarter of the free pages. If you go with the
> last quarter, then you might want to use a higher probability than I
> suggested above, although that would tend to leave you with
> contention when all the free space was in the last quarter. I'd be
> inclined to use something like the above probability and start using
> it at 50%.
Fuzzy thinking there -- if it's the last quarter of the *free* pages,
the suggested probabilities should be fine. (Somehow I got to
thinking, for a moment, that it would be the last quarter of the
relation's overall pages....)
-Kevin
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