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0007490e09
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.
41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* procarray.h
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* POSTGRES process array definitions.
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*
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/storage/procarray.h,v 1.5 2005/08/20 23:26:34 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PROCARRAY_H
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#define PROCARRAY_H
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#include "storage/lock.h"
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extern Size ProcArrayShmemSize(void);
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extern void CreateSharedProcArray(void);
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extern void ProcArrayAdd(PGPROC *proc);
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extern void ProcArrayRemove(PGPROC *proc);
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extern bool TransactionIdIsInProgress(TransactionId xid);
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extern bool TransactionIdIsActive(TransactionId xid);
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extern TransactionId GetOldestXmin(bool allDbs);
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extern PGPROC *BackendPidGetProc(int pid);
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extern int BackendXidGetPid(TransactionId xid);
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extern bool IsBackendPid(int pid);
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extern bool DatabaseHasActiveBackends(Oid databaseId, bool ignoreMyself);
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extern int CountActiveBackends(void);
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extern int CountDBBackends(Oid databaseid);
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extern int CountUserBackends(Oid roleid);
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extern void XidCacheRemoveRunningXids(TransactionId xid,
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int nxids, TransactionId *xids);
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#endif /* PROCARRAY_H */
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