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Fix free space map to correctly track the total amount of FSM space needed

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even when a single relation requires more than max_fsm_pages pages.  Also,
make VACUUM emit a warning in this case, since it likely means that VACUUM
FULL or other drastic corrective measure is needed.  Per reports from Jeff
Frost and others of unexpected changes in the claimed max_fsm_pages need.
This commit is contained in:
Tom Lane
2006-09-21 20:31:22 +00:00
parent b0d64a090b
commit 9e936693a9
10 changed files with 199 additions and 113 deletions
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16
src/include/storage/freespace.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/storage/freespace.h,v 1.21 2006/07/13 16:49:20 momjian Exp $
* $PostgreSQL: pgsql/src/include/storage/freespace.h,v 1.22 2006/09/21 20:31:22 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -115,7 +115,7 @@ struct FSMRelation
FSMRelation *priorPhysical; /* prior rel in arena-storage order */
bool isIndex; /* if true, we store only page numbers */
Size avgRequest; /* moving average of space requests */
int lastPageCount; /* pages passed to RecordRelationFreeSpace */
BlockNumber interestingPages; /* # of pages with useful free space */
int firstChunk; /* chunk # of my first chunk in arena */
int storedPages; /* # of pages stored in arena */
int nextPage; /* index (from 0) to start next search at */
@@ -133,6 +133,7 @@ extern int MaxFSMPages;
*/
extern void InitFreeSpaceMap(void);
extern Size FreeSpaceShmemSize(void);
extern FSMHeader *GetFreeSpaceMap(void);
extern BlockNumber GetPageWithFreeSpace(RelFileNode *rel, Size spaceNeeded);
extern BlockNumber RecordAndGetPageWithFreeSpace(RelFileNode *rel,
@@ -141,13 +142,15 @@ extern BlockNumber RecordAndGetPageWithFreeSpace(RelFileNode *rel,
Size spaceNeeded);
extern Size GetAvgFSMRequestSize(RelFileNode *rel);
extern void RecordRelationFreeSpace(RelFileNode *rel,
int nPages,
PageFreeSpaceInfo *pageSpaces);
BlockNumber interestingPages,
int nPages,
PageFreeSpaceInfo *pageSpaces);
extern BlockNumber GetFreeIndexPage(RelFileNode *rel);
extern void RecordIndexFreeSpace(RelFileNode *rel,
int nPages,
BlockNumber *pages);
BlockNumber interestingPages,
int nPages,
BlockNumber *pages);
extern void FreeSpaceMapTruncateRel(RelFileNode *rel, BlockNumber nblocks);
extern void FreeSpaceMapForgetRel(RelFileNode *rel);
@@ -157,7 +160,6 @@ extern void PrintFreeSpaceMapStatistics(int elevel);
extern void DumpFreeSpaceMap(int code, Datum arg);
extern void LoadFreeSpaceMap(void);
extern FSMHeader *GetFreeSpaceMap(void);
#ifdef FREESPACE_DEBUG
extern void DumpFreeSpace(void);