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help / color / mirror / Atom feedFrom: David Rowley <[email protected]>
To: Chao Li <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: PostgreSQL Developers <[email protected]>
Subject: Re: Small and unlikely overflow hazard in bms_next_member()
Date: Mon, 13 Apr 2026 00:33:04 +1200
Message-ID: <CAApHDvpVKtgtNsXXKECi4KhzH3JpN2k62tg=EcYmsEA+RsKj+A@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
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On Mon, 6 Apr 2026 at 14:01, Chao Li <[email protected]> wrote:
> > On Apr 4, 2026, at 11:30, David Rowley <[email protected]> wrote:
> > Not quite perfect as a set made first as a single word set that later
> > becomes a multi-word set will be double counted. The number of
> > operations on the sets is likely more important anyway, not the number
> > of sets being created. The point is, multi-word sets are rare for most
> > workloads.
> >
>
> What tests did you run after adding the logs to collect the data? This is a method I might borrow in the future for similar investigations.
"make check" then grep regression.diffs for the NOTICE message and
pipe to "wc -l"
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To: [email protected]
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Subject: Re: Small and unlikely overflow hazard in bms_next_member()
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