| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Setting pd_lower in GIN metapage |
| Date: | 2017-09-19 15:47:09 |
| Message-ID: | 7357.1505836029@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> writes:
> On Tue, Sep 19, 2017 at 9:27 AM, Michael Paquier
> <michael(dot)paquier(at)gmail(dot)com> wrote:
>> I am not saying that no index AMs take advantage FPW compressibility
>> for their meta pages. There are cases like this one, as well as one
>> code path in BRIN where this is useful, and it is useful as well when
>> logging FPWs of the init forks for unlogged relations.
> Hmm, why is it useful for logging FPWs of the init forks for unlogged
> relations? We don't use REGBUF_STANDARD in those cases.
But if we started to do so, that would be a concrete benefit of this
patch ...
regards, tom lane
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