Re: new heapcheck contrib module

> On Oct 6, 2020, at 11:27 PM, Andrey Borodin <x4mmm(at)yandex-team(dot)ru> wrote:
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>> 7 окт. 2020 г., в 04:20, Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com> написал(а):
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>>> On Oct 5, 2020, at 5:24 PM, Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com> wrote:
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>>> - This version does not change clog handling, which leaves Andrey's concern unaddressed. Peter also showed some support for (or perhaps just a lack of opposition to) doing more of what Andrey suggests. I may come back to this issue, depending on time available and further feedback.
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>> Attached is a patch set that includes the clog handling as discussed. The 0001 and 0002 are effectively unchanged since version 16 posted yesterday, but this now includes 0003 which creates a non-throwing interface to clog, and 0004 which uses the non-throwing interface from within amcheck's heap checking functions.
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>> I think this is a pretty good sketch for discussion, though I am unsatisfied with the lack of regression test coverage of verify_heapam in the presence of clog truncation. I was hoping to have that as part of v17, but since it is taking a bit longer than I anticipated, I'll have to come back with that in a later patch.
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> Many thanks, Mark! I really appreciate this functionality. It could save me many hours of recreating clogs.

You are quite welcome, though the thanks may be premature. I posted 0003 and 0004 patches mostly as concrete implementation examples that can be criticized.

> I'm not entire sure this message is correct: psprintf(_("xmax %u commit status is lost")
> It seems to me to be not commit status, but rather transaction status.

I have changed several such messages to say "transaction status" rather than "commit status". I'll be posting it in a separate email, shortly.

Thanks for reviewing!

—
Mark Dilger
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