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Improve the description of XLOG_RUNNING_XACTS. 

Previously, the description of XLOG_RUNNING_XACTS showed only
top-transaction XIDs and whether subtransactions overflowed. This commit
improves it to show individual subtransaction XIDs. This also improves the
description of overflowed subtransactions.

This additional information can be helpful for testing and debugging
purposes.

Author: Masahiko Sawada
Reviewd by: Fujii Masao, Kyotaro Horiguchi, Ashutosh Bapat, Bharath Rupireddy
Discussion: https://postgr.es/m/CAD21AoAqvaE+XEeXHHPdAGQPcCoGXxuoeutq_nWhUSQvTt5+tA@mail.gmail.com
This commit is contained in:
Amit Kapila 2022-11-02 10:06:55 +05:30
parent e76502871e
commit 568546f7e4
1 changed files with 8 additions and 1 deletions
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9
src/backend/access/rmgrdesc/standbydesc.c
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@ -33,7 +33,14 @@ standby_desc_running_xacts(StringInfo buf, xl_running_xacts *xlrec)
}
if (xlrec->subxid_overflow)
appendStringInfoString(buf, "; subxid ovf");
appendStringInfoString(buf, "; subxid overflowed");
if (xlrec->subxcnt > 0)
{
appendStringInfo(buf, "; %d subxacts:", xlrec->subxcnt);
for (i = 0; i < xlrec->subxcnt; i++)
appendStringInfo(buf, " %u", xlrec->xids[xlrec->xcnt + i]);
}
}
void