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Code Activity

1. WAL needs in zero-ed content of newly initialized page.

Browse Source 
2. Log record for PageRepaireFragmentation now keeps array
   of !LP_USED offnums to redo cleanup properly.
This commit is contained in:
Vadim B. Mikheev
2000-12-30 15:19:57 +00:00
parent 2783bd50da
commit 3e059b3802
5 changed files with 92 additions and 40 deletions
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32
src/backend/commands/vacuum.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.180 2000/12/28 13:00:18 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.181 2000/12/30 15:19:55 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -47,7 +47,8 @@
#include "utils/syscache.h"
#include "utils/temprel.h"
extern XLogRecPtr log_heap_clean(Relation reln, Buffer buffer);
extern XLogRecPtr log_heap_clean(Relation reln, Buffer buffer,
char *unused, int unlen);
extern XLogRecPtr log_heap_move(Relation reln,
Buffer oldbuf, ItemPointerData from,
Buffer newbuf, HeapTuple newtup);
@@ -878,7 +879,7 @@ scan_heap(VRelStats *vacrelstats, Relation onerel,
if (tempPage != (Page) NULL)
{ /* Some tuples are gone */
PageRepairFragmentation(tempPage);
PageRepairFragmentation(tempPage, NULL);
vacpage->free = ((PageHeader) tempPage)->pd_upper - ((PageHeader) tempPage)->pd_lower;
free_size += vacpage->free;
reap_page(vacuum_pages, vacpage);
@@ -1898,6 +1899,10 @@ failed to add item with len = %lu to page %u (free space %lu, nusd %u, noff %u)"
if (vacpage->blkno == (BlockNumber) (blkno - 1) &&
vacpage->offsets_free > 0)
{
char unbuf[BLCKSZ];
OffsetNumber *unused = (OffsetNumber*)unbuf;
int uncnt;
buf = ReadBuffer(onerel, vacpage->blkno);
LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE);
START_CRIT_CODE;
@@ -1928,9 +1933,11 @@ failed to add item with len = %lu to page %u (free space %lu, nusd %u, noff %u)"
}
Assert(vacpage->offsets_free == num_tuples);
PageRepairFragmentation(page);
uncnt = PageRepairFragmentation(page, unused);
{
XLogRecPtr recptr = log_heap_clean(onerel, buf);
XLogRecPtr recptr;
recptr = log_heap_clean(onerel, buf, (char*)unused,
(char*)(&(unused[uncnt])) - (char*)unused);
PageSetLSN(page, recptr);
PageSetSUI(page, ThisStartUpID);
}
@@ -2039,9 +2046,12 @@ vacuum_heap(VRelStats *vacrelstats, Relation onerel, VacPageList vacuum_pages)
static void
vacuum_page(Relation onerel, Buffer buffer, VacPage vacpage)
{
Page page = BufferGetPage(buffer);
ItemId itemid;
int i;
char unbuf[BLCKSZ];
OffsetNumber *unused = (OffsetNumber*)unbuf;
int uncnt;
Page page = BufferGetPage(buffer);
ItemId itemid;
int i;
/* There shouldn't be any tuples moved onto the page yet! */
Assert(vacpage->offsets_used == 0);
@@ -2052,9 +2062,11 @@ vacuum_page(Relation onerel, Buffer buffer, VacPage vacpage)
itemid = &(((PageHeader) page)->pd_linp[vacpage->offsets[i] - 1]);
itemid->lp_flags &= ~LP_USED;
}
PageRepairFragmentation(page);
uncnt = PageRepairFragmentation(page, unused);
{
XLogRecPtr recptr = log_heap_clean(onerel, buffer);
XLogRecPtr recptr;
recptr = log_heap_clean(onerel, buffer, (char*)unused,
(char*)(&(unused[uncnt])) - (char*)unused);
PageSetLSN(page, recptr);
PageSetSUI(page, ThisStartUpID);
}