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Clear all-frozen visibilitymap status when locking tuples.

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Since a892234 & fd31cd265 the visibilitymap's freeze bit is used to
avoid vacuuming the whole relation in anti-wraparound vacuums. Doing so
correctly relies on not adding xids to the heap without also unsetting
the visibilitymap flag.  Tuple locking related code has not done so.

To allow selectively resetting all-frozen - to avoid pessimizing
heap_lock_tuple - allow to selectively reset the all-frozen with
visibilitymap_clear(). To avoid having to use
visibilitymap_get_status (e.g. via VM_ALL_FROZEN) inside a critical
section, have visibilitymap_clear() return whether any bits have been
reset.

There's a remaining issue (denoted by XXX): After the PageIsAllVisible()
check in heap_lock_tuple() and heap_lock_updated_tuple_rec() the page
status could theoretically change. Practically that currently seems
impossible, because updaters will hold a page level pin already.  Due to
the next beta coming up, it seems better to get the required WAL magic
bump done before resolving this issue.

The added flags field fields to xl_heap_lock and xl_heap_lock_updated
require bumping the WAL magic. Since there's already been a catversion
bump since the last beta, that's not an issue.

Reviewed-By: Robert Haas, Amit Kapila and Andres Freund
Author: Masahiko Sawada, heavily revised by Andres Freund
Discussion: CAEepm=3fWAbWryVW9swHyLTY4sXVf0xbLvXqOwUoDiNCx9mBjQ@mail.gmail.com
Backpatch: -
pull/31/head
Andres Freund 9 years ago
parent 65632082b7
commit eca0f1db14
7 changed files with 194 additions and 58 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 207
      src/backend/access/heap/heapam.c
  2. 18
      src/backend/access/heap/visibilitymap.c
  3. 6
      src/backend/access/rmgrdesc/heapdesc.c
  4. 6
      src/backend/commands/vacuumlazy.c
  5. 9
      src/include/access/heapam_xlog.h
  6. 4
      src/include/access/visibilitymap.h
  7. 2
      src/include/access/xlog_internal.h

207
src/backend/access/heap/heapam.c
Unescape View File

@ -2423,7 +2423,7 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid,
PageClearAllVisible(BufferGetPage(buffer));
visibilitymap_clear(relation,
ItemPointerGetBlockNumber(&(heaptup->t_self)),
vmbuffer);
vmbuffer, VISIBILITYMAP_VALID_BITS);
}
/*
@ -2737,7 +2737,7 @@ heap_multi_insert(Relation relation, HeapTuple *tuples, int ntuples,
PageClearAllVisible(page);
visibilitymap_clear(relation,
BufferGetBlockNumber(buffer),
vmbuffer);
vmbuffer, VISIBILITYMAP_VALID_BITS);
}
/*
@ -3239,7 +3239,7 @@ l1:
all_visible_cleared = true;
PageClearAllVisible(page);
visibilitymap_clear(relation, BufferGetBlockNumber(buffer),
vmbuffer);
vmbuffer, VISIBILITYMAP_VALID_BITS);
}
/* store transaction information of xact deleting the tuple */
@ -3925,6 +3925,7 @@ l2:
TransactionId xmax_lock_old_tuple;
uint16 infomask_lock_old_tuple,
infomask2_lock_old_tuple;
bool cleared_all_frozen = false;
/*
* To prevent concurrent sessions from updating the tuple, we have to
@ -3968,6 +3969,17 @@ l2:
/* temporarily make it look not-updated, but locked */
oldtup.t_data->t_ctid = oldtup.t_self;
/*
* Clear all-frozen bit on visibility map if needed. We could
* immediately reset ALL_VISIBLE, but given that the WAL logging
* overhead would be unchanged, that doesn't seem necessarily
* worthwhile.
*/
if (PageIsAllVisible(BufferGetPage(buffer)) &&
visibilitymap_clear(relation, block, vmbuffer,
VISIBILITYMAP_ALL_FROZEN))
cleared_all_frozen = true;
MarkBufferDirty(buffer);
if (RelationNeedsWAL(relation))
@ -3982,6 +3994,8 @@ l2:
xlrec.locking_xid = xmax_lock_old_tuple;
xlrec.infobits_set = compute_infobits(oldtup.t_data->t_infomask,
oldtup.t_data->t_infomask2);
xlrec.flags =
cleared_all_frozen ? XLH_LOCK_ALL_FROZEN_CLEARED : 0;
XLogRegisterData((char *) &xlrec, SizeOfHeapLock);
recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_LOCK);
PageSetLSN(page, recptr);
@ -4159,20 +4173,20 @@ l2:
/* record address of new tuple in t_ctid of old one */
oldtup.t_data->t_ctid = heaptup->t_self;
/* clear PD_ALL_VISIBLE flags */
/* clear PD_ALL_VISIBLE flags, reset all visibilitymap bits */
if (PageIsAllVisible(BufferGetPage(buffer)))
{
all_visible_cleared = true;
PageClearAllVisible(BufferGetPage(buffer));
visibilitymap_clear(relation, BufferGetBlockNumber(buffer),
vmbuffer);
vmbuffer, VISIBILITYMAP_VALID_BITS);
}
if (newbuf != buffer && PageIsAllVisible(BufferGetPage(newbuf)))
{
all_visible_cleared_new = true;
PageClearAllVisible(BufferGetPage(newbuf));
visibilitymap_clear(relation, BufferGetBlockNumber(newbuf),
vmbuffer_new);
vmbuffer_new, VISIBILITYMAP_VALID_BITS);
}
if (newbuf != buffer)
@ -4556,6 +4570,8 @@ heap_lock_tuple(Relation relation, HeapTuple tuple,
ItemPointer tid = &(tuple->t_self);
ItemId lp;
Page page;
Buffer vmbuffer = InvalidBuffer;
BlockNumber block;
TransactionId xid,
xmax;
uint16 old_infomask,
@ -4563,8 +4579,19 @@ heap_lock_tuple(Relation relation, HeapTuple tuple,
new_infomask2;
bool first_time = true;
bool have_tuple_lock = false;
bool cleared_all_frozen = false;
*buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(tid));
block = ItemPointerGetBlockNumber(tid);
/*
* Before locking the buffer, pin the visibility map page if it may be
* necessary. XXX: It might be possible for this to change after acquiring
* the lock below. We don't yet deal with that case.
*/
if (PageIsAllVisible(BufferGetPage(*buffer)))
visibilitymap_pin(relation, block, &vmbuffer);
LockBuffer(*buffer, BUFFER_LOCK_EXCLUSIVE);
page = BufferGetPage(*buffer);
@ -4580,15 +4607,14 @@ l3:
if (result == HeapTupleInvisible)
{
LockBuffer(*buffer, BUFFER_LOCK_UNLOCK);
/*
* This is possible, but only when locking a tuple for ON CONFLICT
* UPDATE. We return this value here rather than throwing an error in
* order to give that case the opportunity to throw a more specific
* error.
*/
return HeapTupleInvisible;
result = HeapTupleInvisible;
goto out_locked;
}
else if (result == HeapTupleBeingUpdated || result == HeapTupleUpdated)
{
@ -4646,7 +4672,8 @@ l3:
if (TUPLOCK_from_mxstatus(members[i].status) >= mode)
{
pfree(members);
return HeapTupleMayBeUpdated;
result = HeapTupleMayBeUpdated;
goto out_unlocked;
}
}
@ -4661,21 +4688,30 @@ l3:
Assert(HEAP_XMAX_IS_KEYSHR_LOCKED(infomask) ||
HEAP_XMAX_IS_SHR_LOCKED(infomask) ||
HEAP_XMAX_IS_EXCL_LOCKED(infomask));
return HeapTupleMayBeUpdated;
break;
result = HeapTupleMayBeUpdated;
goto out_unlocked;
case LockTupleShare:
if (HEAP_XMAX_IS_SHR_LOCKED(infomask) ||
HEAP_XMAX_IS_EXCL_LOCKED(infomask))
return HeapTupleMayBeUpdated;
{
result = HeapTupleMayBeUpdated;
goto out_unlocked;
}
break;
case LockTupleNoKeyExclusive:
if (HEAP_XMAX_IS_EXCL_LOCKED(infomask))
return HeapTupleMayBeUpdated;
{
result = HeapTupleMayBeUpdated;
goto out_unlocked;
}
break;
case LockTupleExclusive:
if (HEAP_XMAX_IS_EXCL_LOCKED(infomask) &&
infomask2 & HEAP_KEYS_UPDATED)
return HeapTupleMayBeUpdated;
{
result = HeapTupleMayBeUpdated;
goto out_unlocked;
}
break;
}
}
@ -5036,10 +5072,7 @@ failed:
hufd->cmax = HeapTupleHeaderGetCmax(tuple->t_data);
else
hufd->cmax = InvalidCommandId;
LockBuffer(*buffer, BUFFER_LOCK_UNLOCK);
if (have_tuple_lock)
UnlockTupleTuplock(relation, tid, mode);
return result;
goto out_locked;
}
xmax = HeapTupleHeaderGetRawXmax(tuple->t_data);
@ -5094,6 +5127,13 @@ failed:
if (HEAP_XMAX_IS_LOCKED_ONLY(new_infomask))
tuple->t_data->t_ctid = *tid;
/* Clear only the all-frozen bit on visibility map if needed */
if (PageIsAllVisible(page) &&
visibilitymap_clear(relation, block, vmbuffer,
VISIBILITYMAP_ALL_FROZEN))
cleared_all_frozen = true;
MarkBufferDirty(*buffer);
/*
@ -5120,6 +5160,7 @@ failed:
xlrec.locking_xid = xid;
xlrec.infobits_set = compute_infobits(new_infomask,
tuple->t_data->t_infomask2);
xlrec.flags = cleared_all_frozen ? XLH_LOCK_ALL_FROZEN_CLEARED : 0;
XLogRegisterData((char *) &xlrec, SizeOfHeapLock);
/* we don't decode row locks atm, so no need to log the origin */
@ -5131,8 +5172,15 @@ failed:
END_CRIT_SECTION();
result = HeapTupleMayBeUpdated;
out_locked:
LockBuffer(*buffer, BUFFER_LOCK_UNLOCK);
out_unlocked:
if (BufferIsValid(vmbuffer))
ReleaseBuffer(vmbuffer);
/*
* Don't update the visibility map here. Locking a tuple doesn't change
* visibility info.
@ -5145,7 +5193,7 @@ failed:
if (have_tuple_lock)
UnlockTupleTuplock(relation, tid, mode);
return HeapTupleMayBeUpdated;
return result;
}
/*
@ -5577,6 +5625,7 @@ static HTSU_Result
heap_lock_updated_tuple_rec(Relation rel, ItemPointer tid, TransactionId xid,
LockTupleMode mode)
{
HTSU_Result result;
ItemPointerData tupid;
HeapTupleData mytup;
Buffer buf;
@ -5587,6 +5636,9 @@ heap_lock_updated_tuple_rec(Relation rel, ItemPointer tid, TransactionId xid,
TransactionId xmax,
new_xmax;
TransactionId priorXmax = InvalidTransactionId;
bool cleared_all_frozen = false;
Buffer vmbuffer = InvalidBuffer;
BlockNumber block;
ItemPointerCopy(tid, &tupid);
@ -5594,6 +5646,7 @@ heap_lock_updated_tuple_rec(Relation rel, ItemPointer tid, TransactionId xid,
{
new_infomask = 0;
new_xmax = InvalidTransactionId;
block = ItemPointerGetBlockNumber(&tupid);
ItemPointerCopy(&tupid, &(mytup.t_self));
if (!heap_fetch(rel, SnapshotAny, &mytup, &buf, false, NULL))
@ -5610,6 +5663,17 @@ heap_lock_updated_tuple_rec(Relation rel, ItemPointer tid, TransactionId xid,
l4:
CHECK_FOR_INTERRUPTS();
/*
* Before locking the buffer, pin the visibility map page if it may be
* necessary. XXX: It might be possible for this to change after
* acquiring the lock below. We don't yet deal with that case.
*/
if (PageIsAllVisible(BufferGetPage(buf)))
visibilitymap_pin(rel, block, &vmbuffer);
else
vmbuffer = InvalidBuffer;
LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE);
/*
@ -5620,8 +5684,8 @@ l4:
!TransactionIdEquals(HeapTupleHeaderGetXmin(mytup.t_data),
priorXmax))
{
UnlockReleaseBuffer(buf);
return HeapTupleMayBeUpdated;
result = HeapTupleMayBeUpdated;
goto out_locked;
}
old_infomask = mytup.t_data->t_infomask;
@ -5661,11 +5725,9 @@ l4:
HEAP_XMAX_IS_LOCKED_ONLY(old_infomask));
for (i = 0; i < nmembers; i++)
{
HTSU_Result res;
res = test_lockmode_for_conflict(members[i].status,
members[i].xid,
mode, &needwait);
result = test_lockmode_for_conflict(members[i].status,
members[i].xid,
mode, &needwait);
if (needwait)
{
@ -5676,11 +5738,10 @@ l4:
pfree(members);
goto l4;
}
if (res != HeapTupleMayBeUpdated)
if (result != HeapTupleMayBeUpdated)
{
UnlockReleaseBuffer(buf);
pfree(members);
return res;
goto out_locked;
}
}
if (members)
@ -5688,7 +5749,6 @@ l4:
}
else
{
HTSU_Result res;
MultiXactStatus status;
/*
@ -5727,8 +5787,8 @@ l4:
status = MultiXactStatusNoKeyUpdate;
}
res = test_lockmode_for_conflict(status, rawxmax, mode,
&needwait);
result = test_lockmode_for_conflict(status, rawxmax, mode,
&needwait);
if (needwait)
{
LockBuffer(buf, BUFFER_LOCK_UNLOCK);
@ -5736,10 +5796,9 @@ l4:
XLTW_LockUpdated);
goto l4;
}
if (res != HeapTupleMayBeUpdated)
if (result != HeapTupleMayBeUpdated)
{
UnlockReleaseBuffer(buf);
return res;
goto out_locked;
}
}
}
@ -5749,6 +5808,11 @@ l4:
xid, mode, false,
&new_xmax, &new_infomask, &new_infomask2);
if (PageIsAllVisible(BufferGetPage(buf)) &&
visibilitymap_clear(rel, block, vmbuffer,
VISIBILITYMAP_ALL_FROZEN))
cleared_all_frozen = true;
START_CRIT_SECTION();
/* ... and set them */
@ -5773,6 +5837,8 @@ l4:
xlrec.offnum = ItemPointerGetOffsetNumber(&mytup.t_self);
xlrec.xmax = new_xmax;
xlrec.infobits_set = compute_infobits(new_infomask, new_infomask2);
xlrec.flags =
cleared_all_frozen ? XLH_LOCK_ALL_FROZEN_CLEARED : 0;
XLogRegisterData((char *) &xlrec, SizeOfHeapLockUpdated);
@ -5788,15 +5854,28 @@ l4:
ItemPointerEquals(&mytup.t_self, &mytup.t_data->t_ctid) ||
HeapTupleHeaderIsOnlyLocked(mytup.t_data))
{
UnlockReleaseBuffer(buf);
return HeapTupleMayBeUpdated;
result = HeapTupleMayBeUpdated;
goto out_locked;
}
/* tail recursion */
priorXmax = HeapTupleHeaderGetUpdateXid(mytup.t_data);
ItemPointerCopy(&(mytup.t_data->t_ctid), &tupid);
UnlockReleaseBuffer(buf);
if (vmbuffer != InvalidBuffer)
ReleaseBuffer(vmbuffer);
}
result = HeapTupleMayBeUpdated;
out_locked:
UnlockReleaseBuffer(buf);
if (vmbuffer != InvalidBuffer)
ReleaseBuffer(vmbuffer);
return result;
}
/*
@ -8107,7 +8186,7 @@ heap_xlog_delete(XLogReaderState *record)
Buffer vmbuffer = InvalidBuffer;
visibilitymap_pin(reln, blkno, &vmbuffer);
visibilitymap_clear(reln, blkno, vmbuffer);
visibilitymap_clear(reln, blkno, vmbuffer, VISIBILITYMAP_VALID_BITS);
ReleaseBuffer(vmbuffer);
FreeFakeRelcacheEntry(reln);
}
@ -8185,7 +8264,7 @@ heap_xlog_insert(XLogReaderState *record)
Buffer vmbuffer = InvalidBuffer;
visibilitymap_pin(reln, blkno, &vmbuffer);
visibilitymap_clear(reln, blkno, vmbuffer);
visibilitymap_clear(reln, blkno, vmbuffer, VISIBILITYMAP_VALID_BITS);
ReleaseBuffer(vmbuffer);
FreeFakeRelcacheEntry(reln);
}
@ -8305,7 +8384,7 @@ heap_xlog_multi_insert(XLogReaderState *record)
Buffer vmbuffer = InvalidBuffer;
visibilitymap_pin(reln, blkno, &vmbuffer);
visibilitymap_clear(reln, blkno, vmbuffer);
visibilitymap_clear(reln, blkno, vmbuffer, VISIBILITYMAP_VALID_BITS);
ReleaseBuffer(vmbuffer);
FreeFakeRelcacheEntry(reln);
}
@ -8460,7 +8539,7 @@ heap_xlog_update(XLogReaderState *record, bool hot_update)
Buffer vmbuffer = InvalidBuffer;
visibilitymap_pin(reln, oldblk, &vmbuffer);
visibilitymap_clear(reln, oldblk, vmbuffer);
visibilitymap_clear(reln, oldblk, vmbuffer, VISIBILITYMAP_VALID_BITS);
ReleaseBuffer(vmbuffer);
FreeFakeRelcacheEntry(reln);
}
@ -8544,7 +8623,7 @@ heap_xlog_update(XLogReaderState *record, bool hot_update)
Buffer vmbuffer = InvalidBuffer;
visibilitymap_pin(reln, newblk, &vmbuffer);
visibilitymap_clear(reln, newblk, vmbuffer);
visibilitymap_clear(reln, newblk, vmbuffer, VISIBILITYMAP_VALID_BITS);
ReleaseBuffer(vmbuffer);
FreeFakeRelcacheEntry(reln);
}
@ -8724,6 +8803,27 @@ heap_xlog_lock(XLogReaderState *record)
ItemId lp = NULL;
HeapTupleHeader htup;
/*
* The visibility map may need to be fixed even if the heap page is
* already up-to-date.
*/
if (xlrec->flags & XLH_LOCK_ALL_FROZEN_CLEARED)
{
RelFileNode rnode;
Buffer vmbuffer = InvalidBuffer;
BlockNumber block;
Relation reln;
XLogRecGetBlockTag(record, 0, &rnode, NULL, &block);
reln = CreateFakeRelcacheEntry(rnode);
visibilitymap_pin(reln, block, &vmbuffer);
visibilitymap_clear(reln, block, vmbuffer, VISIBILITYMAP_ALL_FROZEN);
ReleaseBuffer(vmbuffer);
FreeFakeRelcacheEntry(reln);
}
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
page = (Page) BufferGetPage(buffer);
@ -8776,6 +8876,27 @@ heap_xlog_lock_updated(XLogReaderState *record)
xlrec = (xl_heap_lock_updated *) XLogRecGetData(record);
/*
* The visibility map may need to be fixed even if the heap page is
* already up-to-date.
*/
if (xlrec->flags & XLH_LOCK_ALL_FROZEN_CLEARED)
{
RelFileNode rnode;
Buffer vmbuffer = InvalidBuffer;
BlockNumber block;
Relation reln;
XLogRecGetBlockTag(record, 0, &rnode, NULL, &block);
reln = CreateFakeRelcacheEntry(rnode);
visibilitymap_pin(reln, block, &vmbuffer);
visibilitymap_clear(reln, block, vmbuffer, VISIBILITYMAP_ALL_FROZEN);
ReleaseBuffer(vmbuffer);
FreeFakeRelcacheEntry(reln);
}
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);

18
src/backend/access/heap/visibilitymap.c
Unescape View File

@ -11,7 +11,7 @@
* src/backend/access/heap/visibilitymap.c
*
* INTERFACE ROUTINES
* visibilitymap_clear - clear a bit in the visibility map
* visibilitymap_clear - clear bits for one page in the visibility map
* visibilitymap_pin - pin a map page for setting a bit
* visibilitymap_pin_ok - check whether correct map page is already pinned
* visibilitymap_set - set a bit in a previously pinned page
@ -159,20 +159,23 @@ static void vm_extend(Relation rel, BlockNumber nvmblocks);
/*
* visibilitymap_clear - clear all bits for one page in visibility map
* visibilitymap_clear - clear specified bits for one page in visibility map
*
* You must pass a buffer containing the correct map page to this function.
* Call visibilitymap_pin first to pin the right one. This function doesn't do
* any I/O.
* any I/O. Returns true if any bits have been cleared and false otherwise.
*/
void
visibilitymap_clear(Relation rel, BlockNumber heapBlk, Buffer buf)
bool
visibilitymap_clear(Relation rel, BlockNumber heapBlk, Buffer buf, uint8 flags)
{
BlockNumber mapBlock = HEAPBLK_TO_MAPBLOCK(heapBlk);
int mapByte = HEAPBLK_TO_MAPBYTE(heapBlk);
int mapOffset = HEAPBLK_TO_OFFSET(heapBlk);
uint8 mask = VISIBILITYMAP_VALID_BITS << mapOffset;
uint8 mask = flags << mapOffset;
char *map;
bool cleared = false;
Assert(flags & VISIBILITYMAP_VALID_BITS);
#ifdef TRACE_VISIBILITYMAP
elog(DEBUG1, "vm_clear %s %d", RelationGetRelationName(rel), heapBlk);
@ -189,9 +192,12 @@ visibilitymap_clear(Relation rel, BlockNumber heapBlk, Buffer buf)
map[mapByte] &= ~mask;
MarkBufferDirty(buf);
cleared = true;
}
LockBuffer(buf, BUFFER_LOCK_UNLOCK);
return cleared;
}
/*

6
src/backend/access/rmgrdesc/heapdesc.c
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@ -85,7 +85,8 @@ heap_desc(StringInfo buf, XLogReaderState *record)
{
xl_heap_lock *xlrec = (xl_heap_lock *) rec;
appendStringInfo(buf, "off %u: xid %u ", xlrec->offnum, xlrec->locking_xid);
appendStringInfo(buf, "off %u: xid %u: flags %u ",
xlrec->offnum, xlrec->locking_xid, xlrec->flags);
out_infobits(buf, xlrec->infobits_set);
}
else if (info == XLOG_HEAP_INPLACE)
@ -138,7 +139,8 @@ heap2_desc(StringInfo buf, XLogReaderState *record)
{
xl_heap_lock_updated *xlrec = (xl_heap_lock_updated *) rec;
appendStringInfo(buf, "off %u: xmax %u ", xlrec->offnum, xlrec->xmax);
appendStringInfo(buf, "off %u: xmax %u: flags %u ",
xlrec->offnum, xlrec->xmax, xlrec->flags);
out_infobits(buf, xlrec->infobits_set);
}
else if (info == XLOG_HEAP2_NEW_CID)

6
src/backend/commands/vacuumlazy.c
Unescape View File

@ -1179,7 +1179,8 @@ lazy_scan_heap(Relation onerel, int options, LVRelStats *vacrelstats,
{
elog(WARNING, "page is not marked all-visible but visibility map bit is set in relation \"%s\" page %u",
relname, blkno);
visibilitymap_clear(onerel, blkno, vmbuffer);
visibilitymap_clear(onerel, blkno, vmbuffer,
VISIBILITYMAP_VALID_BITS);
}
/*
@ -1201,7 +1202,8 @@ lazy_scan_heap(Relation onerel, int options, LVRelStats *vacrelstats,
relname, blkno);
PageClearAllVisible(page);
MarkBufferDirty(buf);
visibilitymap_clear(onerel, blkno, vmbuffer);
visibilitymap_clear(onerel, blkno, vmbuffer,
VISIBILITYMAP_VALID_BITS);
}
/*

9
src/include/access/heapam_xlog.h
Unescape View File

@ -243,15 +243,19 @@ typedef struct xl_heap_cleanup_info
#define XLHL_XMAX_KEYSHR_LOCK 0x08
#define XLHL_KEYS_UPDATED 0x10
/* flag bits for xl_heap_lock / xl_heap_lock_updated's flag field */
#define XLH_LOCK_ALL_FROZEN_CLEARED 0x01
/* This is what we need to know about lock */
typedef struct xl_heap_lock
{
TransactionId locking_xid; /* might be a MultiXactId not xid */
OffsetNumber offnum; /* locked tuple's offset on page */
int8 infobits_set; /* infomask and infomask2 bits to set */
uint8 flags; /* XLH_LOCK_* flag bits */
} xl_heap_lock;
#define SizeOfHeapLock (offsetof(xl_heap_lock, infobits_set) + sizeof(int8))
#define SizeOfHeapLock (offsetof(xl_heap_lock, flags) + sizeof(int8))
/* This is what we need to know about locking an updated version of a row */
typedef struct xl_heap_lock_updated
@ -259,9 +263,10 @@ typedef struct xl_heap_lock_updated
TransactionId xmax;
OffsetNumber offnum;
uint8 infobits_set;
uint8 flags;
} xl_heap_lock_updated;
#define SizeOfHeapLockUpdated (offsetof(xl_heap_lock_updated, infobits_set) + sizeof(uint8))
#define SizeOfHeapLockUpdated (offsetof(xl_heap_lock_updated, flags) + sizeof(uint8))
/* This is what we need to know about confirmation of speculative insertion */
typedef struct xl_heap_confirm

4
src/include/access/visibilitymap.h
Unescape View File

@ -34,8 +34,8 @@
#define VM_ALL_FROZEN(r, b, v) \
((visibilitymap_get_status((r), (b), (v)) & VISIBILITYMAP_ALL_FROZEN) != 0)
extern void visibilitymap_clear(Relation rel, BlockNumber heapBlk,
Buffer vmbuf);
extern bool visibilitymap_clear(Relation rel, BlockNumber heapBlk,
Buffer vmbuf, uint8 flags);
extern void visibilitymap_pin(Relation rel, BlockNumber heapBlk,
Buffer *vmbuf);
extern bool visibilitymap_pin_ok(BlockNumber heapBlk, Buffer vmbuf);

2
src/include/access/xlog_internal.h
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@ -31,7 +31,7 @@
/*
* Each page of XLOG file has a header like this:
*/
#define XLOG_PAGE_MAGIC 0xD092 /* can be used as WAL version indicator */
#define XLOG_PAGE_MAGIC 0xD093 /* can be used as WAL version indicator */
typedef struct XLogPageHeaderData
{

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