Re: Display number of heap accesses for index scans

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Peter Geoghegan <pg(at)bowt(dot)ie>
Cc: Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Display number of heap accesses for index scans
Date: 2017-11-06 03:33:05
Message-ID: 14517.1509939185@sss.pgh.pa.us
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Peter Geoghegan <pg(at)bowt(dot)ie> writes:
> Andres Freund <andres(at)anarazel(dot)de> wrote:
>> The number of index lookups that failed to return anything can be a
>> critical performance factor in OLTP workloads. Therefore it seems like
>> it'd be a good idea to extend the explain analyze output to include that
>> information.

> I certainly agree.

Doesn't the EXPLAIN (BUFFERS) output already address this?

regards, tom lane

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