From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Andres Freund <andres(at)anarazel(dot)de> |
Cc: | Simon Riggs <simon(at)2ndQuadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Suspicious behaviour on applying XLOG_HEAP2_VISIBLE. |
Date: | 2016-04-15 20:53:37 |
Message-ID: | 30429.1460753617@sss.pgh.pa.us |
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Lists: | pgsql-hackers |
Andres Freund <andres(at)anarazel(dot)de> writes:
> On 2016-04-15 15:26:17 -0400, Tom Lane wrote:
>> I think the bottom line is that we misdesigned the WAL representation
>> by assuming that this sort of info could always be piggybacked on a
>> transaction commit record. It's time to fix that.
> I think we got to piggyback it onto a commit record, as long as there's
> one.
No objection to that part. What I'm saying is that when there isn't one,
the answer is a new record type, not forcing xid assignment. It might
look almost like a commit record, but it shouldn't imply that there
was a transaction.
regards, tom lane
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