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-rw-r--r--src/backend/access/heap/heapam.c65
-rw-r--r--src/backend/storage/freespace/freespace.c32
-rw-r--r--src/include/storage/freespace.h4
3 files changed, 92 insertions, 9 deletions
diff --git a/src/backend/access/heap/heapam.c b/src/backend/access/heap/heapam.c
index 8b0c826aaf2..49bca5b3299 100644
--- a/src/backend/access/heap/heapam.c
+++ b/src/backend/access/heap/heapam.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.267 2008/10/31 15:04:59 heikki Exp $
+ * $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.268 2008/10/31 19:40:26 heikki Exp $
*
*
* INTERFACE ROUTINES
@@ -54,6 +54,7 @@
#include "miscadmin.h"
#include "pgstat.h"
#include "storage/bufmgr.h"
+#include "storage/freespace.h"
#include "storage/lmgr.h"
#include "storage/procarray.h"
#include "storage/smgr.h"
@@ -4022,6 +4023,7 @@ heap_xlog_clean(XLogRecPtr lsn, XLogRecord *record, bool clean_move)
int nredirected;
int ndead;
int nunused;
+ Size freespace;
if (record->xl_info & XLR_BKP_BLOCK_1)
return;
@@ -4053,6 +4055,8 @@ heap_xlog_clean(XLogRecPtr lsn, XLogRecord *record, bool clean_move)
nowunused, nunused,
clean_move);
+ freespace = PageGetHeapFreeSpace(page); /* needed to update FSM below */
+
/*
* Note: we don't worry about updating the page's prunability hints.
* At worst this will cause an extra prune cycle to occur soon.
@@ -4062,6 +4066,15 @@ heap_xlog_clean(XLogRecPtr lsn, XLogRecord *record, bool clean_move)
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
UnlockReleaseBuffer(buffer);
+
+ /*
+ * Update the FSM as well.
+ *
+ * XXX: We don't get here if the page was restored from full page image.
+ * We don't bother to update the FSM in that case, it doesn't need to be
+ * totally accurate anyway.
+ */
+ XLogRecordPageWithFreeSpace(xlrec->node, xlrec->block, freespace);
}
static void
@@ -4205,15 +4218,17 @@ heap_xlog_insert(XLogRecPtr lsn, XLogRecord *record)
HeapTupleHeader htup;
xl_heap_header xlhdr;
uint32 newlen;
+ Size freespace;
+ BlockNumber blkno;
if (record->xl_info & XLR_BKP_BLOCK_1)
return;
+ blkno = ItemPointerGetBlockNumber(&(xlrec->target.tid));
+
if (record->xl_info & XLOG_HEAP_INIT_PAGE)
{
- buffer = XLogReadBuffer(xlrec->target.node,
- ItemPointerGetBlockNumber(&(xlrec->target.tid)),
- true);
+ buffer = XLogReadBuffer(xlrec->target.node, blkno, true);
Assert(BufferIsValid(buffer));
page = (Page) BufferGetPage(buffer);
@@ -4221,9 +4236,7 @@ heap_xlog_insert(XLogRecPtr lsn, XLogRecord *record)
}
else
{
- buffer = XLogReadBuffer(xlrec->target.node,
- ItemPointerGetBlockNumber(&(xlrec->target.tid)),
- false);
+ buffer = XLogReadBuffer(xlrec->target.node, blkno, false);
if (!BufferIsValid(buffer))
return;
page = (Page) BufferGetPage(buffer);
@@ -4261,10 +4274,25 @@ heap_xlog_insert(XLogRecPtr lsn, XLogRecord *record)
offnum = PageAddItem(page, (Item) htup, newlen, offnum, true, true);
if (offnum == InvalidOffsetNumber)
elog(PANIC, "heap_insert_redo: failed to add tuple");
+
+ freespace = PageGetHeapFreeSpace(page); /* needed to update FSM below */
+
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
UnlockReleaseBuffer(buffer);
+
+ /*
+ * If the page is running low on free space, update the FSM as well.
+ * Arbitrarily, our definition of "low" is less than 20%. We can't do
+ * much better than that without knowing the fill-factor for the table.
+ *
+ * XXX: We don't get here if the page was restored from full page image.
+ * We don't bother to update the FSM in that case, it doesn't need to be
+ * totally accurate anyway.
+ */
+ if (freespace < BLCKSZ / 5)
+ XLogRecordPageWithFreeSpace(xlrec->target.node, blkno, freespace);
}
/*
@@ -4289,6 +4317,7 @@ heap_xlog_update(XLogRecPtr lsn, XLogRecord *record, bool move, bool hot_update)
xl_heap_header xlhdr;
int hsize;
uint32 newlen;
+ Size freespace;
if (record->xl_info & XLR_BKP_BLOCK_1)
{
@@ -4446,10 +4475,32 @@ newsame:;
offnum = PageAddItem(page, (Item) htup, newlen, offnum, true, true);
if (offnum == InvalidOffsetNumber)
elog(PANIC, "heap_update_redo: failed to add tuple");
+
+ freespace = PageGetHeapFreeSpace(page); /* needed to update FSM below */
+
PageSetLSN(page, lsn);
PageSetTLI(page, ThisTimeLineID);
MarkBufferDirty(buffer);
UnlockReleaseBuffer(buffer);
+
+ /*
+ * If the page is running low on free space, update the FSM as well.
+ * Arbitrarily, our definition of "low" is less than 20%. We can't do
+ * much better than that without knowing the fill-factor for the table.
+ *
+ * However, don't update the FSM on HOT updates, because after crash
+ * recovery, either the old or the new tuple will certainly be dead and
+ * prunable. After pruning, the page will have roughly as much free space
+ * as it did before the update, assuming the new tuple is about the same
+ * size as the old one.
+ *
+ * XXX: We don't get here if the page was restored from full page image.
+ * We don't bother to update the FSM in that case, it doesn't need to be
+ * totally accurate anyway.
+ */
+ if (!hot_update && freespace < BLCKSZ / 5)
+ XLogRecordPageWithFreeSpace(xlrec->target.node,
+ ItemPointerGetBlockNumber(&(xlrec->newtid)), freespace);
}
static void
diff --git a/src/backend/storage/freespace/freespace.c b/src/backend/storage/freespace/freespace.c
index 724e87fa204..10cca029d10 100644
--- a/src/backend/storage/freespace/freespace.c
+++ b/src/backend/storage/freespace/freespace.c
@@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/storage/freespace/freespace.c,v 1.65 2008/10/31 15:05:00 heikki Exp $
+ * $PostgreSQL: pgsql/src/backend/storage/freespace/freespace.c,v 1.66 2008/10/31 19:40:27 heikki Exp $
*
*
* NOTES:
@@ -203,6 +203,36 @@ RecordPageWithFreeSpace(Relation rel, BlockNumber heapBlk, Size spaceAvail)
}
/*
+ * XLogRecordPageWithFreeSpace - like RecordPageWithFreeSpace, for use in
+ * WAL replay
+ */
+void
+XLogRecordPageWithFreeSpace(RelFileNode rnode, BlockNumber heapBlk,
+ Size spaceAvail)
+{
+ int new_cat = fsm_space_avail_to_cat(spaceAvail);
+ FSMAddress addr;
+ uint16 slot;
+ BlockNumber blkno;
+ Buffer buf;
+ Page page;
+
+ /* Get the location of the FSM byte representing the heap block */
+ addr = fsm_get_location(heapBlk, &slot);
+ blkno = fsm_logical_to_physical(addr);
+
+ /* If the page doesn't exist already, extend */
+ buf = XLogReadBufferExtended(rnode, FSM_FORKNUM, blkno, RBM_ZERO_ON_ERROR);
+ page = BufferGetPage(buf);
+ if (PageIsNew(page))
+ PageInit(page, BLCKSZ, 0);
+
+ if (fsm_set_avail(page, slot, new_cat))
+ MarkBufferDirty(buf);
+ UnlockReleaseBuffer(buf);
+}
+
+/*
* GetRecordedFreePage - return the amount of free space on a particular page,
* according to the FSM.
*/
diff --git a/src/include/storage/freespace.h b/src/include/storage/freespace.h
index d417e8c9805..858be595284 100644
--- a/src/include/storage/freespace.h
+++ b/src/include/storage/freespace.h
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/storage/freespace.h,v 1.29 2008/09/30 10:52:13 heikki Exp $
+ * $PostgreSQL: pgsql/src/include/storage/freespace.h,v 1.30 2008/10/31 19:40:27 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@@ -27,6 +27,8 @@ extern BlockNumber RecordAndGetPageWithFreeSpace(Relation rel,
Size spaceNeeded);
extern void RecordPageWithFreeSpace(Relation rel, BlockNumber heapBlk,
Size spaceAvail);
+extern void XLogRecordPageWithFreeSpace(RelFileNode rnode, BlockNumber heapBlk,
+ Size spaceAvail);
extern void FreeSpaceMapTruncateRel(Relation rel, BlockNumber nblocks);
extern void FreeSpaceMapVacuum(Relation rel);
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-28 17:14:42 +0000