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Modify BufferGetPage() to prepare for "snapshot too old" feature

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This patch is a no-op patch which is intended to reduce the chances
of failures of omission once the functional part of the "snapshot
too old" patch goes in.  It adds parameters for snapshot, relation,
and an enum to specify whether the snapshot age check needs to be
done for the page at this point.  This initial patch passes NULL
for the first two new parameters and BGP_NO_SNAPSHOT_TEST for the
third.  The follow-on patch will change the places where the test
needs to be made.
This commit is contained in:
Kevin Grittner
2016-04-08 14:30:10 -05:00
parent 689f9a0588
commit 8b65cf4c5e
65 changed files with 735 additions and 522 deletions
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108
src/backend/access/heap/heapam.c
View File

@ -394,7 +394,7 @@ heapgetpage(HeapScanDesc scan, BlockNumber page)
*/
LockBuffer(buffer, BUFFER_LOCK_SHARE);
dp = (Page) BufferGetPage(buffer);
dp = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lines = PageGetMaxOffsetNumber(dp);
ntup = 0;
@ -537,7 +537,7 @@ heapgettup(HeapScanDesc scan,
LockBuffer(scan->rs_cbuf, BUFFER_LOCK_SHARE);
dp = (Page) BufferGetPage(scan->rs_cbuf);
dp = BufferGetPage(scan->rs_cbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lines = PageGetMaxOffsetNumber(dp);
/* page and lineoff now reference the physically next tid */
@ -582,7 +582,7 @@ heapgettup(HeapScanDesc scan,
LockBuffer(scan->rs_cbuf, BUFFER_LOCK_SHARE);
dp = (Page) BufferGetPage(scan->rs_cbuf);
dp = BufferGetPage(scan->rs_cbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lines = PageGetMaxOffsetNumber(dp);
if (!scan->rs_inited)
@ -616,7 +616,7 @@ heapgettup(HeapScanDesc scan,
heapgetpage(scan, page);
/* Since the tuple was previously fetched, needn't lock page here */
dp = (Page) BufferGetPage(scan->rs_cbuf);
dp = BufferGetPage(scan->rs_cbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lineoff = ItemPointerGetOffsetNumber(&(tuple->t_self));
lpp = PageGetItemId(dp, lineoff);
Assert(ItemIdIsNormal(lpp));
@ -745,7 +745,7 @@ heapgettup(HeapScanDesc scan,
LockBuffer(scan->rs_cbuf, BUFFER_LOCK_SHARE);
dp = (Page) BufferGetPage(scan->rs_cbuf);
dp = BufferGetPage(scan->rs_cbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lines = PageGetMaxOffsetNumber((Page) dp);
linesleft = lines;
if (backward)
@ -832,7 +832,7 @@ heapgettup_pagemode(HeapScanDesc scan,
lineindex = scan->rs_cindex + 1;
}
dp = (Page) BufferGetPage(scan->rs_cbuf);
dp = BufferGetPage(scan->rs_cbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lines = scan->rs_ntuples;
/* page and lineindex now reference the next visible tid */
@ -875,7 +875,7 @@ heapgettup_pagemode(HeapScanDesc scan,
page = scan->rs_cblock; /* current page */
}
dp = (Page) BufferGetPage(scan->rs_cbuf);
dp = BufferGetPage(scan->rs_cbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lines = scan->rs_ntuples;
if (!scan->rs_inited)
@ -908,7 +908,7 @@ heapgettup_pagemode(HeapScanDesc scan,
heapgetpage(scan, page);
/* Since the tuple was previously fetched, needn't lock page here */
dp = (Page) BufferGetPage(scan->rs_cbuf);
dp = BufferGetPage(scan->rs_cbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lineoff = ItemPointerGetOffsetNumber(&(tuple->t_self));
lpp = PageGetItemId(dp, lineoff);
Assert(ItemIdIsNormal(lpp));
@ -1027,7 +1027,7 @@ heapgettup_pagemode(HeapScanDesc scan,
heapgetpage(scan, page);
dp = (Page) BufferGetPage(scan->rs_cbuf);
dp = BufferGetPage(scan->rs_cbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lines = scan->rs_ntuples;
linesleft = lines;
if (backward)
@ -1871,7 +1871,7 @@ heap_fetch(Relation relation,
* Need share lock on buffer to examine tuple commit status.
*/
LockBuffer(buffer, BUFFER_LOCK_SHARE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
/*
* We'd better check for out-of-range offnum in case of VACUUM since the
@ -1986,7 +1986,7 @@ heap_hot_search_buffer(ItemPointer tid, Relation relation, Buffer buffer,
Snapshot snapshot, HeapTuple heapTuple,
bool *all_dead, bool first_call)
{
Page dp = (Page) BufferGetPage(buffer);
Page dp = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
TransactionId prev_xmax = InvalidTransactionId;
OffsetNumber offnum;
bool at_chain_start;
@ -2200,7 +2200,7 @@ heap_get_latest_tid(Relation relation,
*/
buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(&ctid));
LockBuffer(buffer, BUFFER_LOCK_SHARE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
/*
* Check for bogus item number. This is not treated as an error
@ -2418,10 +2418,12 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid,
RelationPutHeapTuple(relation, buffer, heaptup,
(options & HEAP_INSERT_SPECULATIVE) != 0);
if (PageIsAllVisible(BufferGetPage(buffer)))
if (PageIsAllVisible(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
{
all_visible_cleared = true;
PageClearAllVisible(BufferGetPage(buffer));
PageClearAllVisible(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST));
visibilitymap_clear(relation,
ItemPointerGetBlockNumber(&(heaptup->t_self)),
vmbuffer);
@ -2446,7 +2448,8 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid,
xl_heap_insert xlrec;
xl_heap_header xlhdr;
XLogRecPtr recptr;
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
uint8 info = XLOG_HEAP_INSERT;
int bufflags = 0;
@ -2705,7 +2708,7 @@ heap_multi_insert(Relation relation, HeapTuple *tuples, int ntuples,
buffer = RelationGetBufferForTuple(relation, heaptuples[ndone]->t_len,
InvalidBuffer, options, bistate,
&vmbuffer, NULL);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
/* NO EREPORT(ERROR) from here till changes are logged */
START_CRIT_SECTION();
@ -3019,7 +3022,7 @@ heap_delete(Relation relation, ItemPointer tid,
block = ItemPointerGetBlockNumber(tid);
buffer = ReadBuffer(relation, block);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
/*
* Before locking the buffer, pin the visibility map page if it appears to
@ -3509,7 +3512,7 @@ heap_update(Relation relation, ItemPointer otid, HeapTuple newtup,
block = ItemPointerGetBlockNumber(otid);
buffer = ReadBuffer(relation, block);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
/*
* Before locking the buffer, pin the visibility map page if it appears to
@ -4110,17 +4113,22 @@ l2:
oldtup.t_data->t_ctid = heaptup->t_self;
/* clear PD_ALL_VISIBLE flags */
if (PageIsAllVisible(BufferGetPage(buffer)))
if (PageIsAllVisible(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
{
all_visible_cleared = true;
PageClearAllVisible(BufferGetPage(buffer));
PageClearAllVisible(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST));
visibilitymap_clear(relation, BufferGetBlockNumber(buffer),
vmbuffer);
}
if (newbuf != buffer && PageIsAllVisible(BufferGetPage(newbuf)))
if (newbuf != buffer &&
PageIsAllVisible(BufferGetPage(newbuf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
{
all_visible_cleared_new = true;
PageClearAllVisible(BufferGetPage(newbuf));
PageClearAllVisible(BufferGetPage(newbuf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST));
visibilitymap_clear(relation, BufferGetBlockNumber(newbuf),
vmbuffer_new);
}
@ -4151,9 +4159,12 @@ l2:
all_visible_cleared_new);
if (newbuf != buffer)
{
PageSetLSN(BufferGetPage(newbuf), recptr);
PageSetLSN(BufferGetPage(newbuf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST),
recptr);
}
PageSetLSN(BufferGetPage(buffer), recptr);
PageSetLSN(BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST),
recptr);
}
END_CRIT_SECTION();
@ -4517,7 +4528,7 @@ heap_lock_tuple(Relation relation, HeapTuple tuple,
*buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(tid));
LockBuffer(*buffer, BUFFER_LOCK_EXCLUSIVE);
page = BufferGetPage(*buffer);
page = BufferGetPage(*buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
lp = PageGetItemId(page, ItemPointerGetOffsetNumber(tid));
Assert(ItemIdIsNormal(lp));
@ -5695,7 +5706,8 @@ l4:
{
xl_heap_lock_updated xlrec;
XLogRecPtr recptr;
Page page = BufferGetPage(buf);
Page page = BufferGetPage(buf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
XLogBeginInsert();
XLogRegisterBuffer(0, buf, REGBUF_STANDARD);
@ -5802,7 +5814,7 @@ heap_finish_speculative(Relation relation, HeapTuple tuple)
buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(&(tuple->t_self)));
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
page = (Page) BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
offnum = ItemPointerGetOffsetNumber(&(tuple->t_self));
if (PageGetMaxOffsetNumber(page) >= offnum)
@ -5896,7 +5908,7 @@ heap_abort_speculative(Relation relation, HeapTuple tuple)
block = ItemPointerGetBlockNumber(tid);
buffer = ReadBuffer(relation, block);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
@ -6043,7 +6055,7 @@ heap_inplace_update(Relation relation, HeapTuple tuple)
buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(&(tuple->t_self)));
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
page = (Page) BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
offnum = ItemPointerGetOffsetNumber(&(tuple->t_self));
if (PageGetMaxOffsetNumber(page) >= offnum)
@ -7298,7 +7310,8 @@ log_heap_update(Relation reln, Buffer oldbuf,
uint16 prefixlen = 0,
suffixlen = 0;
XLogRecPtr recptr;
Page page = BufferGetPage(newbuf);
Page page = BufferGetPage(newbuf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
bool need_tuple_data = RelationIsLogicallyLogged(reln);
bool init;
int bufflags;
@ -7747,7 +7760,8 @@ heap_xlog_clean(XLogReaderState *record)
&buffer);
if (action == BLK_NEEDS_REDO)
{
Page page = (Page) BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
OffsetNumber *end;
OffsetNumber *redirected;
OffsetNumber *nowdead;
@ -7853,7 +7867,7 @@ heap_xlog_visible(XLogReaderState *record)
* XLOG record's LSN, we mustn't mark the page all-visible, because
* the subsequent update won't be replayed to clear the flag.
*/
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
PageSetAllVisible(page);
@ -7879,7 +7893,8 @@ heap_xlog_visible(XLogReaderState *record)
if (XLogReadBufferForRedoExtended(record, 0, RBM_ZERO_ON_ERROR, false,
&vmbuffer) == BLK_NEEDS_REDO)
{
Page vmpage = BufferGetPage(vmbuffer);
Page vmpage = BufferGetPage(vmbuffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
Relation reln;
/* initialize the page if it was read as zeros */
@ -7946,7 +7961,8 @@ heap_xlog_freeze_page(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
xl_heap_freeze_tuple *tuples;
tuples = (xl_heap_freeze_tuple *) XLogRecGetBlockData(record, 0, NULL);
@ -8033,7 +8049,7 @@ heap_xlog_delete(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (PageGetMaxOffsetNumber(page) >= xlrec->offnum)
lp = PageGetItemId(page, xlrec->offnum);
@ -8116,7 +8132,7 @@ heap_xlog_insert(XLogReaderState *record)
if (XLogRecGetInfo(record) & XLOG_HEAP_INIT_PAGE)
{
buffer = XLogInitBufferForRedo(record, 0);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
PageInit(page, BufferGetPageSize(buffer), 0);
action = BLK_NEEDS_REDO;
}
@ -8127,7 +8143,7 @@ heap_xlog_insert(XLogReaderState *record)
Size datalen;
char *data;
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (PageGetMaxOffsetNumber(page) + 1 < xlrec->offnum)
elog(PANIC, "invalid max offset number");
@ -8232,7 +8248,7 @@ heap_xlog_multi_insert(XLogReaderState *record)
if (isinit)
{
buffer = XLogInitBufferForRedo(record, 0);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
PageInit(page, BufferGetPageSize(buffer), 0);
action = BLK_NEEDS_REDO;
}
@ -8248,7 +8264,7 @@ heap_xlog_multi_insert(XLogReaderState *record)
tupdata = XLogRecGetBlockData(record, 0, &len);
endptr = tupdata + len;
page = (Page) BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
for (i = 0; i < xlrec->ntuples; i++)
{
@ -8399,7 +8415,7 @@ heap_xlog_update(XLogReaderState *record, bool hot_update)
&obuffer);
if (oldaction == BLK_NEEDS_REDO)
{
page = BufferGetPage(obuffer);
page = BufferGetPage(obuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
offnum = xlrec->old_offnum;
if (PageGetMaxOffsetNumber(page) >= offnum)
lp = PageGetItemId(page, offnum);
@ -8446,7 +8462,7 @@ heap_xlog_update(XLogReaderState *record, bool hot_update)
else if (XLogRecGetInfo(record) & XLOG_HEAP_INIT_PAGE)
{
nbuffer = XLogInitBufferForRedo(record, 0);
page = (Page) BufferGetPage(nbuffer);
page = BufferGetPage(nbuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
PageInit(page, BufferGetPageSize(nbuffer), 0);
newaction = BLK_NEEDS_REDO;
}
@ -8479,7 +8495,7 @@ heap_xlog_update(XLogReaderState *record, bool hot_update)
recdata = XLogRecGetBlockData(record, 0, &datalen);
recdata_end = recdata + datalen;
page = BufferGetPage(nbuffer);
page = BufferGetPage(nbuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
offnum = xlrec->new_offnum;
if (PageGetMaxOffsetNumber(page) + 1 < offnum)
@ -8609,7 +8625,7 @@ heap_xlog_confirm(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
offnum = xlrec->offnum;
if (PageGetMaxOffsetNumber(page) >= offnum)
@ -8645,7 +8661,7 @@ heap_xlog_lock(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
page = (Page) BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
offnum = xlrec->offnum;
if (PageGetMaxOffsetNumber(page) >= offnum)
@ -8695,7 +8711,7 @@ heap_xlog_lock_updated(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
offnum = xlrec->offnum;
if (PageGetMaxOffsetNumber(page) >= offnum)
@ -8734,7 +8750,7 @@ heap_xlog_inplace(XLogReaderState *record)
{
char *newtup = XLogRecGetBlockData(record, 0, &newlen);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
offnum = xlrec->offnum;
if (PageGetMaxOffsetNumber(page) >= offnum)

27
src/backend/access/heap/hio.c
View File

@ -48,7 +48,7 @@ RelationPutHeapTuple(Relation relation,
Assert(!token || HeapTupleHeaderIsSpeculative(tuple->t_data));
/* Add the tuple to the page */
pageHeader = BufferGetPage(buffer);
pageHeader = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
offnum = PageAddItem(pageHeader, (Item) tuple->t_data,
tuple->t_len, InvalidOffsetNumber, false, true);
@ -132,10 +132,13 @@ GetVisibilityMapPins(Relation relation, Buffer buffer1, Buffer buffer2,
while (1)
{
/* Figure out which pins we need but don't have. */
need_to_pin_buffer1 = PageIsAllVisible(BufferGetPage(buffer1))
need_to_pin_buffer1 =
PageIsAllVisible(BufferGetPage(buffer1, NULL, NULL,
BGP_NO_SNAPSHOT_TEST))
&& !visibilitymap_pin_ok(block1, *vmbuffer1);
need_to_pin_buffer2 = buffer2 != InvalidBuffer
&& PageIsAllVisible(BufferGetPage(buffer2))
&& PageIsAllVisible(BufferGetPage(buffer2, NULL, NULL,
BGP_NO_SNAPSHOT_TEST))
&& !visibilitymap_pin_ok(block2, *vmbuffer2);
if (!need_to_pin_buffer1 && !need_to_pin_buffer2)
return;
@ -205,7 +208,7 @@ RelationAddExtraBlocks(Relation relation, BulkInsertState bistate)
/* Extend by one page. */
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
PageInit(page, BufferGetPageSize(buffer), 0);
MarkBufferDirty(buffer);
blockNum = BufferGetBlockNumber(buffer);
@ -397,7 +400,8 @@ loop:
{
/* easy case */
buffer = ReadBufferBI(relation, targetBlock, bistate);
if (PageIsAllVisible(BufferGetPage(buffer)))
if (PageIsAllVisible(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
visibilitymap_pin(relation, targetBlock, vmbuffer);
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
}
@ -405,7 +409,8 @@ loop:
{
/* also easy case */
buffer = otherBuffer;
if (PageIsAllVisible(BufferGetPage(buffer)))
if (PageIsAllVisible(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
visibilitymap_pin(relation, targetBlock, vmbuffer);
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
}
@ -413,7 +418,8 @@ loop:
{
/* lock other buffer first */
buffer = ReadBuffer(relation, targetBlock);
if (PageIsAllVisible(BufferGetPage(buffer)))
if (PageIsAllVisible(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
visibilitymap_pin(relation, targetBlock, vmbuffer);
LockBuffer(otherBuffer, BUFFER_LOCK_EXCLUSIVE);
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
@ -422,7 +428,8 @@ loop:
{
/* lock target buffer first */
buffer = ReadBuffer(relation, targetBlock);
if (PageIsAllVisible(BufferGetPage(buffer)))
if (PageIsAllVisible(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
visibilitymap_pin(relation, targetBlock, vmbuffer);
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
LockBuffer(otherBuffer, BUFFER_LOCK_EXCLUSIVE);
@ -462,7 +469,7 @@ loop:
* Now we can check to see if there's enough free space here. If so,
* we're done.
*/
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
pageFreeSpace = PageGetHeapFreeSpace(page);
if (len + saveFreeSpace <= pageFreeSpace)
{
@ -583,7 +590,7 @@ loop:
* is empty (this should never happen, but if it does we don't want to
* risk wiping out valid data).
*/
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (!PageIsNew(page))
elog(ERROR, "page %u of relation \"%s\" should be empty but is not",

12
src/backend/access/heap/pruneheap.c
View File

@ -74,7 +74,7 @@ static void heap_prune_record_unused(PruneState *prstate, OffsetNumber offnum);
void
heap_page_prune_opt(Relation relation, Buffer buffer)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Size minfree;
TransactionId OldestXmin;
@ -174,7 +174,7 @@ heap_page_prune(Relation relation, Buffer buffer, TransactionId OldestXmin,
bool report_stats, TransactionId *latestRemovedXid)
{
int ndeleted = 0;
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
OffsetNumber offnum,
maxoff;
PruneState prstate;
@ -261,7 +261,8 @@ heap_page_prune(Relation relation, Buffer buffer, TransactionId OldestXmin,
prstate.nowunused, prstate.nunused,
prstate.latestRemovedXid);
PageSetLSN(BufferGetPage(buffer), recptr);
PageSetLSN(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST), recptr);
}
}
else
@ -347,7 +348,7 @@ heap_prune_chain(Relation relation, Buffer buffer, OffsetNumber rootoffnum,
PruneState *prstate)
{
int ndeleted = 0;
Page dp = (Page) BufferGetPage(buffer);
Page dp = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
TransactionId priorXmax = InvalidTransactionId;
ItemId rootlp;
HeapTupleHeader htup;
@ -673,7 +674,8 @@ heap_page_prune_execute(Buffer buffer,
OffsetNumber *nowdead, int ndead,
OffsetNumber *nowunused, int nunused)
{
Page page = (Page) BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
OffsetNumber *offnum;
int i;

21
src/backend/access/heap/visibilitymap.c
View File

@ -179,7 +179,8 @@ visibilitymap_clear(Relation rel, BlockNumber heapBlk, Buffer buf)
elog(ERROR, "wrong buffer passed to visibilitymap_clear");
LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE);
map = PageGetContents(BufferGetPage(buf));
map = PageGetContents(BufferGetPage(buf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST));
if (map[mapByte] & mask)
{
@ -287,7 +288,7 @@ visibilitymap_set(Relation rel, BlockNumber heapBlk, Buffer heapBuf,
if (!BufferIsValid(vmBuf) || BufferGetBlockNumber(vmBuf) != mapBlock)
elog(ERROR, "wrong VM buffer passed to visibilitymap_set");
page = BufferGetPage(vmBuf);
page = BufferGetPage(vmBuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
map = (uint8 *)PageGetContents(page);
LockBuffer(vmBuf, BUFFER_LOCK_EXCLUSIVE);
@ -312,7 +313,8 @@ visibilitymap_set(Relation rel, BlockNumber heapBlk, Buffer heapBuf,
*/
if (XLogHintBitIsNeeded())
{
Page heapPage = BufferGetPage(heapBuf);
Page heapPage = BufferGetPage(heapBuf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
/* caller is expected to set PD_ALL_VISIBLE first */
Assert(PageIsAllVisible(heapPage));
@ -377,7 +379,8 @@ visibilitymap_get_status(Relation rel, BlockNumber heapBlk, Buffer *buf)
return false;
}
map = PageGetContents(BufferGetPage(*buf));
map = PageGetContents(BufferGetPage(*buf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST));
/*
* A single byte read is atomic. There could be memory-ordering effects
@ -426,7 +429,8 @@ visibilitymap_count(Relation rel, BlockNumber *all_visible, BlockNumber *all_fro
* immediately stale anyway if anyone is concurrently setting or
* clearing bits, and we only really need an approximate value.
*/
map = (unsigned char *) PageGetContents(BufferGetPage(mapBuffer));
map = (unsigned char *) PageGetContents(BufferGetPage
(mapBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST));
for (i = 0; i < MAPSIZE; i++)
{
@ -493,7 +497,7 @@ visibilitymap_truncate(Relation rel, BlockNumber nheapblocks)
return;
}
page = BufferGetPage(mapBuffer);
page = BufferGetPage(mapBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
map = PageGetContents(page);
LockBuffer(mapBuffer, BUFFER_LOCK_EXCLUSIVE);
@ -587,8 +591,9 @@ vm_readbuf(Relation rel, BlockNumber blkno, bool extend)
*/
buf = ReadBufferExtended(rel, VISIBILITYMAP_FORKNUM, blkno,
RBM_ZERO_ON_ERROR, NULL);
if (PageIsNew(BufferGetPage(buf)))
PageInit(BufferGetPage(buf), BLCKSZ, 0);
if (PageIsNew(BufferGetPage(buf, NULL, NULL, BGP_NO_SNAPSHOT_TEST)))
PageInit(BufferGetPage(buf, NULL, NULL, BGP_NO_SNAPSHOT_TEST),
BLCKSZ, 0);
return buf;
}