| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Separating Buffer LWlocks |
| Date: | 2015-09-08 17:54:49 |
| Message-ID: | 20150908175449.GG5084@alap3.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
On 2015-09-08 13:29:28 -0400, Robert Haas wrote:
> I like this approach, though I think clearly it needs more performance testing.
Yea, obviously. I did run this on a slightly bigger machine yesterday
and it gave consistent ~8% performance improvements.
> The method of determining the tranche IDs is totally awful, though. I
> assume that's just a dirty hack for the POC and not something you'd
> seriously consider doing.
If you're referring to assigning fixed ids in the guts of lwlocks.c -
yea, that was really more of a quick hack. I think we should put a enum
into lwlock.h with fixed tranch ids with the final member being
LWTRANCHE_FIRST_DYNAMIC or so.
Greetings,
Andres Freund
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