Re: [PATCH] pageinspect function to decode infomasks

Masahiko Sawada <sawada.mshk@gmail.com>

From: Masahiko Sawada <sawada.mshk@gmail.com>
To: Craig Ringer <craig@2ndquadrant.com>
Cc: Ashutosh Sharma <ashu.coek88@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Tomas Vondra <tomas.vondra@2ndquadrant.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2017-10-17T07:03:19Z
Lists: pgsql-hackers
On Thu, Sep 14, 2017 at 11:00 PM, Craig Ringer <craig@2ndquadrant.com> wrote:
> On 14 September 2017 at 19:57, Ashutosh Sharma <ashu.coek88@gmail.com>
> wrote:
>
>>
>>
>> Are you planning to work on the review comments from Robert, Moon
>> Insung and supply the new patch. I just had a quick glance into this
>> mail thread (after a long time) and could understand Robert's concern
>> till some extent. I think, he is trying to say that if a tuple is
>> frozen (committed|invalid) then it shouldn't be shown as COMMITTED and
>> INVALID together in fact it should just be displayed as FROZEN tuple.
>
>
> Yes, I'd like to, and should have time for it in this CF.
>
> My plan is to emit raw flags by default, so FROZEN would't be shown at all,
> only COMMITTED|INVALID. If the bool to decode combined flags is set, then
> it'll show things like FROZEN, and hide COMMITTED|INVALID. Similar for other
> combos.
>

FWIW, I agree with this direction. ISTM the showing the raw flags by
default and having an option to show combined flags would be a right
way.
I sometimes wanted to have the same mechanism for lp_flags but maybe
it should be discussed on a separated thread.

Regards,

--
Masahiko Sawada
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center


Commits

  1. Redesign pageinspect function printing infomask bits

  2. Add to pageinspect function to make t_infomask/t_infomask2 human-readable

  3. Improve documentation of pageinspect

  4. Improve pageinspect module