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Code

Improve description of some WAL records with transaction commands

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This commit improves the description of some WAL records for the
Transaction RMGR:
- Track remote_apply for a transaction commit.  This GUC is
user-settable, so this information can be useful for debugging.
- Add replication origin information for PREPARE TRANSACTION, with the
origin ID, LSN and timestamp
- Same as above, for ROLLBACK PREPARED.

This impacts the format of pg_waldump or anything using these
description routines, so no backpatch is done.

Author: Masahiko Sawada, Michael Paquier
Discussion: https://postgr.es/m/CAD21AoD2dJfgsdxk4_KciAZMZQoUiCvmV9sDpp8ZuKLtKCNXaA@mail.gmail.com
This commit is contained in:
Michael Paquier 2021-12-13 11:02:47 +09:00
parent 07eee5a0dc
commit c8b733c4c4
1 changed files with 28 additions and 4 deletions
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32
src/backend/access/rmgrdesc/xactdesc.c
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@ -16,6 +16,7 @@
#include "access/transam.h"
#include "access/xact.h"
#include "replication/origin.h"
#include "storage/sinval.h"
#include "storage/standbydefs.h"
#include "utils/timestamp.h"
@ -299,6 +300,9 @@ xact_desc_commit(StringInfo buf, uint8 info, xl_xact_commit *xlrec, RepOriginId
parsed.tsId,
XactCompletionRelcacheInitFileInval(parsed.xinfo));
if (XactCompletionApplyFeedback(parsed.xinfo))
appendStringInfoString(buf, "; apply_feedback");
if (XactCompletionForceSyncCommit(parsed.xinfo))
appendStringInfoString(buf, "; sync");
@ -312,7 +316,7 @@ xact_desc_commit(StringInfo buf, uint8 info, xl_xact_commit *xlrec, RepOriginId
}
static void
xact_desc_abort(StringInfo buf, uint8 info, xl_xact_abort *xlrec)
xact_desc_abort(StringInfo buf, uint8 info, xl_xact_abort *xlrec, RepOriginId origin_id)
{
xl_xact_parsed_abort parsed;
@ -326,10 +330,18 @@ xact_desc_abort(StringInfo buf, uint8 info, xl_xact_abort *xlrec)
xact_desc_relations(buf, "rels", parsed.nrels, parsed.xnodes);
xact_desc_subxacts(buf, parsed.nsubxacts, parsed.subxacts);
if (parsed.xinfo & XACT_XINFO_HAS_ORIGIN)
{
appendStringInfo(buf, "; origin: node %u, lsn %X/%X, at %s",
origin_id,
LSN_FORMAT_ARGS(parsed.origin_lsn),
timestamptz_to_str(parsed.origin_timestamp));
}
}
static void
xact_desc_prepare(StringInfo buf, uint8 info, xl_xact_prepare *xlrec)
xact_desc_prepare(StringInfo buf, uint8 info, xl_xact_prepare *xlrec, RepOriginId origin_id)
{
xl_xact_parsed_prepare parsed;
@ -345,6 +357,16 @@ xact_desc_prepare(StringInfo buf, uint8 info, xl_xact_prepare *xlrec)
standby_desc_invalidations(buf, parsed.nmsgs, parsed.msgs, parsed.dbId,
parsed.tsId, xlrec->initfileinval);
/*
* Check if the replication origin has been set in this record in the
* same way as PrepareRedoAdd().
*/
if (origin_id != InvalidRepOriginId)
appendStringInfo(buf, "; origin: node %u, lsn %X/%X, at %s",
origin_id,
LSN_FORMAT_ARGS(parsed.origin_lsn),
timestamptz_to_str(parsed.origin_timestamp));
}
static void
@ -375,13 +397,15 @@ xact_desc(StringInfo buf, XLogReaderState *record)
{
xl_xact_abort *xlrec = (xl_xact_abort *) rec;
xact_desc_abort(buf, XLogRecGetInfo(record), xlrec);
xact_desc_abort(buf, XLogRecGetInfo(record), xlrec,
XLogRecGetOrigin(record));
}
else if (info == XLOG_XACT_PREPARE)
{
xl_xact_prepare *xlrec = (xl_xact_prepare *) rec;
xact_desc_prepare(buf, XLogRecGetInfo(record), xlrec);
xact_desc_prepare(buf, XLogRecGetInfo(record), xlrec,
XLogRecGetOrigin(record));
}
else if (info == XLOG_XACT_ASSIGNMENT)
{