Hi,
On 08/09/2010 09:14 PM, Tom Lane wrote:
As far as SLRU is concerned, the already-agreed-to plan is to get rid of
the separate arenas for SLRU and merge those things into the main shared
buffers arena.
I didn't know about that plan. Sounds good. (I'm personally thinking
this is trying to solve the same problem in a more specific fashion).
IIRC, the motivation for designing SLRU the way it is
was to ensure that SLRU uses couldn't be starved for memory due to high
demand for shared buffers. But that was back when people frequently ran
PG with only a few meg for shared buffers; I think that worry is
obsolete.
Good to know.
So I don't see this patch as offering anything at all that we care about
so far as the core server is concerned. Maybe there are extensions that
need it badly enough to justify such a feature in core, but SLRU is not
a good argument for it.
Fair enough.
(Patch is already marked as "returned with feedback" on the commitfest
app, thanks again for additional feedback)
Regards
Markus Wanner
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