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Convert the arithmetic for shared memory size calculation from 'int'

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to 'Size' (that is, size_t), and install overflow detection checks in it.
This allows us to remove the former arbitrary restrictions on NBuffers
etc.  It won't make any difference in a 32-bit machine, but in a 64-bit
machine you could theoretically have terabytes of shared buffers.
(How efficiently we could manage 'em remains to be seen.)  Similarly,
num_temp_buffers, work_mem, and maintenance_work_mem can be set above
2Gb on a 64-bit machine.  Original patch from Koichi Suzuki, additional
work by moi.
This commit is contained in:
Tom Lane
2005-08-20 23:26:37 +00:00
parent 2299ceab1c
commit 0007490e09
50 changed files with 774 additions and 275 deletions
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4
src/include/access/clog.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/clog.h,v 1.13 2005/06/06 17:01:24 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/clog.h,v 1.14 2005/08/20 23:26:29 tgl Exp $
*/
#ifndef CLOG_H
#define CLOG_H
@@ -31,7 +31,7 @@ typedef int XidStatus;
extern void TransactionIdSetStatus(TransactionId xid, XidStatus status);
extern XidStatus TransactionIdGetStatus(TransactionId xid);
extern int CLOGShmemSize(void);
extern Size CLOGShmemSize(void);
extern void CLOGShmemInit(void);
extern void BootStrapCLOG(void);
extern void StartupCLOG(void);

4
src/include/access/multixact.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/multixact.h,v 1.5 2005/08/20 01:29:16 ishii Exp $
* $PostgreSQL: pgsql/src/include/access/multixact.h,v 1.6 2005/08/20 23:26:29 tgl Exp $
*/
#ifndef MULTIXACT_H
#define MULTIXACT_H
@@ -48,7 +48,7 @@ extern int GetMultiXactIdMembers(MultiXactId multi, TransactionId **xids);
extern void AtEOXact_MultiXact(void);
extern int MultiXactShmemSize(void);
extern Size MultiXactShmemSize(void);
extern void MultiXactShmemInit(void);
extern void BootStrapMultiXact(void);
extern void StartupMultiXact(void);

4
src/include/access/slru.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/slru.h,v 1.12 2005/07/04 04:51:52 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/slru.h,v 1.13 2005/08/20 23:26:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -96,7 +96,7 @@ typedef SlruCtlData *SlruCtl;
typedef struct SlruFlushData *SlruFlush;
extern int SimpleLruShmemSize(void);
extern Size SimpleLruShmemSize(void);
extern void SimpleLruInit(SlruCtl ctl, const char *name,
LWLockId ctllock, const char *subdir);
extern int SimpleLruZeroPage(SlruCtl ctl, int pageno);

4
src/include/access/subtrans.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/subtrans.h,v 1.6 2005/06/17 22:32:48 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/subtrans.h,v 1.7 2005/08/20 23:26:29 tgl Exp $
*/
#ifndef SUBTRANS_H
#define SUBTRANS_H
@@ -15,7 +15,7 @@ extern void SubTransSetParent(TransactionId xid, TransactionId parent);
extern TransactionId SubTransGetParent(TransactionId xid);
extern TransactionId SubTransGetTopmostTransaction(TransactionId xid);
extern int SUBTRANSShmemSize(void);
extern Size SUBTRANSShmemSize(void);
extern void SUBTRANSShmemInit(void);
extern void BootStrapSUBTRANS(void);
extern void StartupSUBTRANS(TransactionId oldestActiveXID);

4
src/include/access/twophase.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/twophase.h,v 1.4 2005/06/28 05:09:03 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/twophase.h,v 1.5 2005/08/20 23:26:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -27,7 +27,7 @@ typedef struct GlobalTransactionData *GlobalTransaction;
/* GUC variable */
extern int max_prepared_xacts;
extern int TwoPhaseShmemSize(void);
extern Size TwoPhaseShmemSize(void);
extern void TwoPhaseShmemInit(void);
extern PGPROC *TwoPhaseGetDummyProc(TransactionId xid);

4
src/include/access/xlog.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.67 2005/07/29 19:30:08 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.68 2005/08/20 23:26:29 tgl Exp $
*/
#ifndef XLOG_H
#define XLOG_H
@@ -156,7 +156,7 @@ extern void xlog_redo(XLogRecPtr lsn, XLogRecord *record);
extern void xlog_desc(char *buf, uint8 xl_info, char *rec);
extern void UpdateControlFile(void);
extern int XLOGShmemSize(void);
extern Size XLOGShmemSize(void);
extern void XLOGShmemInit(void);
extern void BootStrapXLOG(void);
extern void StartupXLOG(void);