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Improve bulk-insert performance by keeping the current target buffer pinned

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(but not locked, as that would risk deadlocks).  Also, make it work in a small
ring of buffers to avoid having bulk inserts trash the whole buffer arena.

Robert Haas, after an idea of Simon Riggs'.
This commit is contained in:
Tom Lane
2008-11-06 20:51:15 +00:00
parent cdc197cf31
commit 85e2cedf98
12 changed files with 203 additions and 84 deletions
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13
src/include/access/heapam.h
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@@ -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/access/heapam.h,v 1.139 2008/10/08 01:14:44 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/heapam.h,v 1.140 2008/11/06 20:51:15 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -25,6 +25,12 @@
#include "utils/snapshot.h"
/* "options" flag bits for heap_insert */
#define HEAP_INSERT_SKIP_WAL 0x0001
#define HEAP_INSERT_SKIP_FSM 0x0002
typedef struct BulkInsertStateData *BulkInsertState;
typedef enum
{
LockTupleShared,
@@ -86,8 +92,11 @@ extern void heap_get_latest_tid(Relation relation, Snapshot snapshot,
ItemPointer tid);
extern void setLastTid(const ItemPointer tid);
extern BulkInsertState GetBulkInsertState(void);
extern void FreeBulkInsertState(BulkInsertState);
extern Oid heap_insert(Relation relation, HeapTuple tup, CommandId cid,
bool use_wal, bool use_fsm);
int options, BulkInsertState bistate);
extern HTSU_Result heap_delete(Relation relation, ItemPointer tid,
ItemPointer ctid, TransactionId *update_xmax,
CommandId cid, Snapshot crosscheck, bool wait);