diff options
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/access/rmgrdesc/committsdesc.c | 6 | ||||
| -rw-r--r-- | src/backend/access/transam/commit_ts.c | 21 | ||||
| -rw-r--r-- | src/backend/commands/vacuum.c | 10 |
3 files changed, 25 insertions, 12 deletions
diff --git a/src/backend/access/rmgrdesc/committsdesc.c b/src/backend/access/rmgrdesc/committsdesc.c index 86f23405aa6..3e670bd5438 100644 --- a/src/backend/access/rmgrdesc/committsdesc.c +++ b/src/backend/access/rmgrdesc/committsdesc.c @@ -33,10 +33,10 @@ commit_ts_desc(StringInfo buf, XLogReaderState *record) } else if (info == COMMIT_TS_TRUNCATE) { - int pageno; + xl_commit_ts_truncate *trunc = (xl_commit_ts_truncate *) rec; - memcpy(&pageno, rec, sizeof(int)); - appendStringInfo(buf, "%d", pageno); + appendStringInfo(buf, "pageno %d, oldestXid %u", + trunc->pageno, trunc->oldestXid); } else if (info == COMMIT_TS_SETTS) { diff --git a/src/backend/access/transam/commit_ts.c b/src/backend/access/transam/commit_ts.c index 2403de3ae36..18a5f5602c7 100644 --- a/src/backend/access/transam/commit_ts.c +++ b/src/backend/access/transam/commit_ts.c @@ -113,7 +113,7 @@ static bool CommitTsPagePrecedes(int page1, int page2); static void ActivateCommitTs(void); static void DeactivateCommitTs(void); static void WriteZeroPageXlogRec(int pageno); -static void WriteTruncateXlogRec(int pageno); +static void WriteTruncateXlogRec(int pageno, TransactionId oldestXid); static void WriteSetTimestampXlogRec(TransactionId mainxid, int nsubxids, TransactionId *subxids, TimestampTz timestamp, RepOriginId nodeid); @@ -824,7 +824,7 @@ TruncateCommitTs(TransactionId oldestXact) return; /* nothing to remove */ /* Write XLOG record */ - WriteTruncateXlogRec(cutoffPage); + WriteTruncateXlogRec(cutoffPage, oldestXact); /* Now we can remove the old CommitTs segment(s) */ SimpleLruTruncate(CommitTsCtl, cutoffPage); @@ -910,10 +910,15 @@ WriteZeroPageXlogRec(int pageno) * Write a TRUNCATE xlog record */ static void -WriteTruncateXlogRec(int pageno) +WriteTruncateXlogRec(int pageno, TransactionId oldestXid) { + xl_commit_ts_truncate xlrec; + + xlrec.pageno = pageno; + xlrec.oldestXid = oldestXid; + XLogBeginInsert(); - XLogRegisterData((char *) (&pageno), sizeof(int)); + XLogRegisterData((char *) (&xlrec), SizeOfCommitTsTruncate); (void) XLogInsert(RM_COMMIT_TS_ID, COMMIT_TS_TRUNCATE); } @@ -967,17 +972,17 @@ commit_ts_redo(XLogReaderState *record) } else if (info == COMMIT_TS_TRUNCATE) { - int pageno; + xl_commit_ts_truncate *trunc = (xl_commit_ts_truncate *) XLogRecGetData(record); - memcpy(&pageno, XLogRecGetData(record), sizeof(int)); + AdvanceOldestCommitTsXid(trunc->oldestXid); /* * During XLOG replay, latest_page_number isn't set up yet; insert a * suitable value to bypass the sanity test in SimpleLruTruncate. */ - CommitTsCtl->shared->latest_page_number = pageno; + CommitTsCtl->shared->latest_page_number = trunc->pageno; - SimpleLruTruncate(CommitTsCtl, pageno); + SimpleLruTruncate(CommitTsCtl, trunc->pageno); } else if (info == COMMIT_TS_SETTS) { diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c index 0f72c1c36ad..812fb4a48fe 100644 --- a/src/backend/commands/vacuum.c +++ b/src/backend/commands/vacuum.c @@ -1153,6 +1153,15 @@ vac_truncate_clog(TransactionId frozenXID, return; /* + * Advance the oldest value for commit timestamps before truncating, so + * that if a user requests a timestamp for a transaction we're truncating + * away right after this point, they get NULL instead of an ugly "file not + * found" error from slru.c. This doesn't matter for xact/multixact + * because they are not subject to arbitrary lookups from users. + */ + AdvanceOldestCommitTsXid(frozenXID); + + /* * Truncate CLOG, multixact and CommitTs to the oldest computed value. */ TruncateCLOG(frozenXID); @@ -1167,7 +1176,6 @@ vac_truncate_clog(TransactionId frozenXID, */ SetTransactionIdLimit(frozenXID, oldestxid_datoid); SetMultiXactIdLimit(minMulti, minmulti_datoid); - AdvanceOldestCommitTsXid(frozenXID); } |