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Commitb73859d

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Patch against 7.2.1 sources. Uses Solaris Intimate Shared Memory
for Solaris on SPARC. Scott Brunza (sbrunza@sonalysts.com) getscredit for identifying the issue, making the change, and doingthe regression tests.Earlier testing on 7.2rc2 and 7.2 showed performance gains of1% to 10% on pgbench, osdb-pg, and some locally developed apps.Solaris Intimate Shared Memory is described in "SOLARIS INTERNALSCore Kernel Components" by Jim Mauro and Richard McDougall,Copyright 2001 Sun Microsystem, Inc. ISBN 0-13-022496-0P.J. "Josh" Rovero
1 parent291c875 commitb73859d

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  • src/backend/storage/ipc

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+15
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‎src/backend/storage/ipc/ipc.c‎

Lines changed: 15 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
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*
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* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipc.c,v 1.77 2002/03/06 06:10:05 momjian Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipc.c,v 1.78 2002/04/13 19:52:51 momjian Exp $
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*
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* NOTES
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*
@@ -632,7 +632,12 @@ InternalIpcMemoryCreate(IpcMemoryKey memKey, uint32 size, int permission)
632632
on_shmem_exit(IpcMemoryDelete,Int32GetDatum(shmid));
633633

634634
/* OK, should be able to attach to the segment */
635-
memAddress=shmat(shmid,0,0);
635+
#if defined(solaris)&& defined(__sparc__)
636+
/* use intimate shared memory on SPARC Solaris */
637+
memAddress=shmat(shmid,0,SHM_SHARE_MMU);
638+
#else
639+
memAddress=shmat(shmid,0,0);
640+
#endif
636641

637642
if (memAddress== (void*)-1)
638643
{
@@ -812,7 +817,14 @@ IpcMemoryCreate(uint32 size, bool makePrivate, int permission)
812817
shmid=shmget(NextShmemSegID,sizeof(PGShmemHeader),0);
813818
if (shmid<0)
814819
continue;/* failed: must be some other app's */
815-
memAddress=shmat(shmid,0,0);
820+
821+
#if defined(solaris)&& defined(__sparc__)
822+
/* use intimate shared memory on SPARC Solaris */
823+
memAddress=shmat(shmid,0,SHM_SHARE_MMU);
824+
#else
825+
memAddress=shmat(shmid,0,0);
826+
#endif
827+
816828
if (memAddress== (void*)-1)
817829
continue;/* failed: must be some other app's */
818830
hdr= (PGShmemHeader*)memAddress;

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