From: Nathan Bossart <nathandbossart@gmail.com>
To: Stephen Frost <sfrost@snowman.net>
Cc: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Cc: David G. Johnston <david.g.johnston@gmail.com>
Cc: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: predefined role(s) for VACUUM and ANALYZE
Date: Wed, 28 Sep 2022 13:12:22 -0700
Message-ID: <20220928201222.GA1400058@nathanxps13> (raw)
In-Reply-To: <CAOuzzgpQtdqj2BfwheD9+fjUnVSo1cmdrQmwcr-qbvKjC5cfyg@mail.gmail.com>
References: <CA+TgmoaQExEDdRmQsFCd955dxCypDBeA_FOrUKCLNWAdQ69zxg@mail.gmail.com>
<20220920035147.GA114383@nathanxps13>
<YylTkIwvWuYJkMnT@paquier.xyz>
<20220920180533.GA205278@nathanxps13>
<20220920233117.GA378596@nathanxps13>
<20220920235010.GB378596@nathanxps13>
<Yyppg/c4SB7s1IAv@paquier.xyz>
<20220921043126.GA382738@nathanxps13>
<20220928185034.GA1397229@nathanxps13>
<CAOuzzgpQtdqj2BfwheD9+fjUnVSo1cmdrQmwcr-qbvKjC5cfyg@mail.gmail.com>
On Wed, Sep 28, 2022 at 03:09:46PM -0400, Stephen Frost wrote:
> On Wed, Sep 28, 2022 at 14:50 Nathan Bossart <nathandbossart@gmail.com>
> wrote:
>> I've been testing aclmask() with long aclitem arrays (2,000 entries is
>> close to the limit for pg_class entries), and I haven't found any
>> significant impact from bumping AclMode to 64 bits.
>
> The max is the same regardless of the size..? Considering the size is
> capped since pg_class doesn’t (and isn’t likely to..) have a toast table,
> that seems unlikely, so I’m asking for clarification on that. We may be
> able to get consensus that the difference isn’t material since no one is
> likely to have such long lists, but we should at least be aware.
While pg_class doesn't have a TOAST table, that column is marked as
"extended," so I believe it is still compressed, and the maximum aclitem
array length for pg_class.relacl would depend on how well the array
compresses.
--
Nathan Bossart
Amazon Web Services: https://aws.amazon.com
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To: pgsql-hackers@postgresql.org
Cc: nathandbossart@gmail.com, sfrost@snowman.net, bharath.rupireddyforpostgres@gmail.com, david.g.johnston@gmail.com, horikyota.ntt@gmail.com, michael@paquier.xyz, robertmhaas@gmail.com
Subject: Re: predefined role(s) for VACUUM and ANALYZE
In-Reply-To: <20220928201222.GA1400058@nathanxps13>
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