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Support an optional asynchronous commit mode, in which we don't flush WAL

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before reporting a transaction committed.  Data consistency is still
guaranteed (unlike setting fsync = off), but a crash may lose the effects
of the last few transactions.  Patch by Simon, some editorialization by Tom.
This commit is contained in:
Tom Lane
2007-08-01 22:45:09 +00:00
parent c722628a43
commit 4a78cdeb6b
25 changed files with 998 additions and 303 deletions
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10
src/backend/utils/init/flatfiles.c
View File

@@ -23,7 +23,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/utils/init/flatfiles.c,v 1.26 2007/06/12 17:16:52 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/init/flatfiles.c,v 1.27 2007/08/01 22:45:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -855,6 +855,14 @@ AtEOXact_UpdateFlatFiles(bool isCommit)
* Signal the postmaster to reload its caches.
*/
SendPostmasterSignal(PMSIGNAL_PASSWORD_CHANGE);
/*
* Force synchronous commit, to minimize the window between changing
* the flat files on-disk and marking the transaction committed. It's
* not great that there is any window at all, but definitely we don't
* want to make it larger than necessary.
*/
ForceSyncCommit();
}

14
src/backend/utils/misc/guc.c
View File

@@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.407 2007/07/24 04:54:09 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.408 2007/08/01 22:45:09 tgl Exp $
*
*--------------------------------------------------------------------
*/
@@ -553,6 +553,14 @@ static struct config_bool ConfigureNamesBool[] =
&enableFsync,
true, NULL, NULL
},
{
{"synchronous_commit", PGC_USERSET, WAL_SETTINGS,
gettext_noop("Sets immediate fsync at commit."),
NULL
},
&XactSyncCommit,
true, NULL, NULL
},
{
{"zero_damaged_pages", PGC_SUSET, DEVELOPER_OPTIONS,
gettext_noop("Continues processing past damaged page headers."),
@@ -1521,7 +1529,7 @@ static struct config_int ConfigureNamesInt[] =
},
{
{"commit_delay", PGC_USERSET, WAL_CHECKPOINTS,
{"commit_delay", PGC_USERSET, WAL_SETTINGS,
gettext_noop("Sets the delay in microseconds between transaction commit and "
"flushing WAL to disk."),
NULL
@@ -1531,7 +1539,7 @@ static struct config_int ConfigureNamesInt[] =
},
{
{"commit_siblings", PGC_USERSET, WAL_CHECKPOINTS,
{"commit_siblings", PGC_USERSET, WAL_SETTINGS,
gettext_noop("Sets the minimum concurrent open transactions before performing "
"commit_delay."),
NULL

1
src/backend/utils/misc/postgresql.conf.sample
View File

@@ -149,6 +149,7 @@
# - Settings -
#fsync = on # turns forced synchronization on or off
#synchronous_commit = on # immediate fsync at commit
#wal_sync_method = fsync # the default is the first option
# supported by the operating system:
# open_datasync

334
src/backend/utils/time/tqual.c
View File

@@ -31,7 +31,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.102 2007/03/25 19:45:14 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.103 2007/08/01 22:45:09 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -80,6 +80,44 @@ TransactionId RecentGlobalXmin = InvalidTransactionId;
static bool XidInMVCCSnapshot(TransactionId xid, Snapshot snapshot);
/*
* HeapTupleSetHintBits()
*
* Set commit/abort hint bits on a tuple, if appropriate at this time.
*
* We cannot change the LSN of the page here because we may hold only a share
* lock on the buffer, so it is only safe to set a transaction-committed hint
* bit if we know the transaction's commit record has been flushed to disk.
*
* We can always set hint bits when marking a transaction aborted. Also,
* if we are cleaning up HEAP_MOVED_IN or HEAP_MOVED_OFF entries, then
* we can always set the hint bits, since VACUUM FULL always uses synchronous
* commits.
*
* Normal commits may be asynchronous, so for those we need to get the LSN
* of the transaction and then check whether this is flushed.
*
* The caller should pass xid as the XID of the transaction to check, or
* InvalidTransactionId if no check is needed.
*/
static inline void
HeapTupleSetHintBits(HeapTupleHeader tuple, Buffer buffer,
uint16 infomask, TransactionId xid)
{
if (TransactionIdIsValid(xid))
{
/* NB: xid must be known committed here! */
XLogRecPtr commitLSN = TransactionIdGetCommitLSN(xid);
if (XLogNeedsFlush(commitLSN))
return; /* not flushed yet, so don't set hint */
}
tuple->t_infomask |= infomask;
SetBufferCommitInfoNeedsSave(buffer);
}
/*
* HeapTupleSatisfiesSelf
* True iff heap tuple is valid "for itself".
@@ -122,12 +160,12 @@ HeapTupleSatisfiesSelf(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
{
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
}
}
else if (tuple->t_infomask & HEAP_MOVED_IN)
@@ -139,14 +177,12 @@ HeapTupleSatisfiesSelf(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
if (TransactionIdIsInProgress(xvac))
return false;
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
else
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
}
@@ -164,8 +200,8 @@ HeapTupleSatisfiesSelf(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
/* deleting subtransaction aborted? */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
{
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
@@ -176,15 +212,13 @@ HeapTupleSatisfiesSelf(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
else if (TransactionIdIsInProgress(HeapTupleHeaderGetXmin(tuple)))
return false;
else if (TransactionIdDidCommit(HeapTupleHeaderGetXmin(tuple)))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
HeapTupleHeaderGetXmin(tuple));
else
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
}
@@ -221,8 +255,8 @@ HeapTupleSatisfiesSelf(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
if (!TransactionIdDidCommit(HeapTupleHeaderGetXmax(tuple)))
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
@@ -230,13 +264,13 @@ HeapTupleSatisfiesSelf(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
if (tuple->t_infomask & HEAP_IS_LOCKED)
{
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
tuple->t_infomask |= HEAP_XMAX_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_COMMITTED,
HeapTupleHeaderGetXmax(tuple));
return false;
}
@@ -299,12 +333,12 @@ HeapTupleSatisfiesNow(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
{
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
}
}
else if (tuple->t_infomask & HEAP_MOVED_IN)
@@ -316,14 +350,12 @@ HeapTupleSatisfiesNow(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
if (TransactionIdIsInProgress(xvac))
return false;
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
else
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
}
@@ -344,8 +376,8 @@ HeapTupleSatisfiesNow(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
/* deleting subtransaction aborted? */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
{
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
@@ -359,15 +391,13 @@ HeapTupleSatisfiesNow(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
else if (TransactionIdIsInProgress(HeapTupleHeaderGetXmin(tuple)))
return false;
else if (TransactionIdDidCommit(HeapTupleHeaderGetXmin(tuple)))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
HeapTupleHeaderGetXmin(tuple));
else
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
}
@@ -407,8 +437,8 @@ HeapTupleSatisfiesNow(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
if (!TransactionIdDidCommit(HeapTupleHeaderGetXmax(tuple)))
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
@@ -416,13 +446,13 @@ HeapTupleSatisfiesNow(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
if (tuple->t_infomask & HEAP_IS_LOCKED)
{
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
tuple->t_infomask |= HEAP_XMAX_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_COMMITTED,
HeapTupleHeaderGetXmax(tuple));
return false;
}
@@ -469,12 +499,12 @@ HeapTupleSatisfiesToast(HeapTupleHeader tuple, Snapshot snapshot,
{
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
}
}
else if (tuple->t_infomask & HEAP_MOVED_IN)
@@ -486,14 +516,12 @@ HeapTupleSatisfiesToast(HeapTupleHeader tuple, Snapshot snapshot,
if (TransactionIdIsInProgress(xvac))
return false;
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
else
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
}
@@ -550,12 +578,12 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid,
{
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return HeapTupleInvisible;
}
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
}
}
else if (tuple->t_infomask & HEAP_MOVED_IN)
@@ -567,14 +595,12 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid,
if (TransactionIdIsInProgress(xvac))
return HeapTupleInvisible;
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
else
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return HeapTupleInvisible;
}
}
@@ -595,8 +621,8 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid,
/* deleting subtransaction aborted? */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
{
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return HeapTupleMayBeUpdated;
}
@@ -610,15 +636,13 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid,
else if (TransactionIdIsInProgress(HeapTupleHeaderGetXmin(tuple)))
return HeapTupleInvisible;
else if (TransactionIdDidCommit(HeapTupleHeaderGetXmin(tuple)))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
HeapTupleHeaderGetXmin(tuple));
else
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return HeapTupleInvisible;
}
}
@@ -642,8 +666,8 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid,
if (MultiXactIdIsRunning(HeapTupleHeaderGetXmax(tuple)))
return HeapTupleBeingUpdated;
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return HeapTupleMayBeUpdated;
}
@@ -663,8 +687,8 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid,
if (!TransactionIdDidCommit(HeapTupleHeaderGetXmax(tuple)))
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return HeapTupleMayBeUpdated;
}
@@ -672,13 +696,13 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid,
if (tuple->t_infomask & HEAP_IS_LOCKED)
{
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return HeapTupleMayBeUpdated;
}
tuple->t_infomask |= HEAP_XMAX_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_COMMITTED,
HeapTupleHeaderGetXmax(tuple));
return HeapTupleUpdated; /* updated by other */
}
@@ -723,12 +747,12 @@ HeapTupleSatisfiesDirty(HeapTupleHeader tuple, Snapshot snapshot,
{
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
}
}
else if (tuple->t_infomask & HEAP_MOVED_IN)
@@ -740,14 +764,12 @@ HeapTupleSatisfiesDirty(HeapTupleHeader tuple, Snapshot snapshot,
if (TransactionIdIsInProgress(xvac))
return false;
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
else
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
}
@@ -765,8 +787,8 @@ HeapTupleSatisfiesDirty(HeapTupleHeader tuple, Snapshot snapshot,
/* deleting subtransaction aborted? */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
{
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
@@ -781,15 +803,13 @@ HeapTupleSatisfiesDirty(HeapTupleHeader tuple, Snapshot snapshot,
return true; /* in insertion by other */
}
else if (TransactionIdDidCommit(HeapTupleHeaderGetXmin(tuple)))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
HeapTupleHeaderGetXmin(tuple));
else
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
}
@@ -829,8 +849,8 @@ HeapTupleSatisfiesDirty(HeapTupleHeader tuple, Snapshot snapshot,
if (!TransactionIdDidCommit(HeapTupleHeaderGetXmax(tuple)))
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
@@ -838,13 +858,13 @@ HeapTupleSatisfiesDirty(HeapTupleHeader tuple, Snapshot snapshot,
if (tuple->t_infomask & HEAP_IS_LOCKED)
{
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
tuple->t_infomask |= HEAP_XMAX_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_COMMITTED,
HeapTupleHeaderGetXmax(tuple));
return false; /* updated by other */
}
@@ -888,12 +908,12 @@ HeapTupleSatisfiesMVCC(HeapTupleHeader tuple, Snapshot snapshot,
{
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
}
}
else if (tuple->t_infomask & HEAP_MOVED_IN)
@@ -905,14 +925,12 @@ HeapTupleSatisfiesMVCC(HeapTupleHeader tuple, Snapshot snapshot,
if (TransactionIdIsInProgress(xvac))
return false;
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
else
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
}
@@ -934,8 +952,8 @@ HeapTupleSatisfiesMVCC(HeapTupleHeader tuple, Snapshot snapshot,
/* FIXME -- is this correct w.r.t. the cmax of the tuple? */
if (TransactionIdDidAbort(HeapTupleHeaderGetXmax(tuple)))
{
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
@@ -949,15 +967,13 @@ HeapTupleSatisfiesMVCC(HeapTupleHeader tuple, Snapshot snapshot,
else if (TransactionIdIsInProgress(HeapTupleHeaderGetXmin(tuple)))
return false;
else if (TransactionIdDidCommit(HeapTupleHeaderGetXmin(tuple)))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
HeapTupleHeaderGetXmin(tuple));
else
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return false;
}
}
@@ -998,14 +1014,14 @@ HeapTupleSatisfiesMVCC(HeapTupleHeader tuple, Snapshot snapshot,
if (!TransactionIdDidCommit(HeapTupleHeaderGetXmax(tuple)))
{
/* it must have aborted or crashed */
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return true;
}
/* xmax transaction committed */
tuple->t_infomask |= HEAP_XMAX_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_COMMITTED,
HeapTupleHeaderGetXmax(tuple));
}
/*
@@ -1054,12 +1070,12 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin,
return HEAPTUPLE_DELETE_IN_PROGRESS;
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return HEAPTUPLE_DEAD;
}
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
}
else if (tuple->t_infomask & HEAP_MOVED_IN)
{
@@ -1070,14 +1086,12 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin,
if (TransactionIdIsInProgress(xvac))
return HEAPTUPLE_INSERT_IN_PROGRESS;
if (TransactionIdDidCommit(xvac))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
else
{
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return HEAPTUPLE_DEAD;
}
}
@@ -1091,21 +1105,22 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin,
return HEAPTUPLE_DELETE_IN_PROGRESS;
}
else if (TransactionIdDidCommit(HeapTupleHeaderGetXmin(tuple)))
{
tuple->t_infomask |= HEAP_XMIN_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
HeapTupleHeaderGetXmin(tuple));
else
{
/*
* Not in Progress, Not Committed, so either Aborted or crashed
*/
tuple->t_infomask |= HEAP_XMIN_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMIN_INVALID,
InvalidTransactionId);
return HEAPTUPLE_DEAD;
}
/* Should only get here if we set XMIN_COMMITTED */
Assert(tuple->t_infomask & HEAP_XMIN_COMMITTED);
/*
* At this point the xmin is known committed, but we might not have
* been able to set the hint bit yet; so we can no longer Assert
* that it's set.
*/
}
/*
@@ -1143,8 +1158,8 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin,
* We know that xmax did lock the tuple, but it did not and will
* never actually update it.
*/
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
}
return HEAPTUPLE_LIVE;
}
@@ -1161,21 +1176,22 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin,
if (TransactionIdIsInProgress(HeapTupleHeaderGetXmax(tuple)))
return HEAPTUPLE_DELETE_IN_PROGRESS;
else if (TransactionIdDidCommit(HeapTupleHeaderGetXmax(tuple)))
{
tuple->t_infomask |= HEAP_XMAX_COMMITTED;
SetBufferCommitInfoNeedsSave(buffer);
}
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_COMMITTED,
HeapTupleHeaderGetXmax(tuple));
else
{
/*
* Not in Progress, Not Committed, so either Aborted or crashed
*/
tuple->t_infomask |= HEAP_XMAX_INVALID;
SetBufferCommitInfoNeedsSave(buffer);
HeapTupleSetHintBits(tuple, buffer, HEAP_XMAX_INVALID,
InvalidTransactionId);
return HEAPTUPLE_LIVE;
}
/* Should only get here if we set XMAX_COMMITTED */
Assert(tuple->t_infomask & HEAP_XMAX_COMMITTED);
/*
* At this point the xmax is known committed, but we might not have
* been able to set the hint bit yet; so we can no longer Assert
* that it's set.
*/
}
/*