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Split the shared-memory array of PGPROC pointers out of the sinval

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communication structure, and make it its own module with its own lock.
This should reduce contention at least a little, and it definitely makes
the code seem cleaner.  Per my recent proposal.
This commit is contained in:
Tom Lane
2005-05-19 21:35:48 +00:00
parent 6910032a56
commit ee3b71f6bc
30 changed files with 923 additions and 860 deletions
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8
src/backend/access/transam/multixact.c
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@@ -31,7 +31,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/access/transam/multixact.c,v 1.3 2005/05/07 18:14:25 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/multixact.c,v 1.4 2005/05/19 21:35:45 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -44,7 +44,7 @@
#include "utils/memutils.h"
#include "storage/backendid.h"
#include "storage/lmgr.h"
#include "storage/sinval.h"
#include "storage/procarray.h"
/*
@@ -383,8 +383,8 @@ MultiXactIdIsRunning(MultiXactId multi)
}
/*
* This could be made better by having a special entry point in sinval.c,
* walking the PGPROC array only once for the whole array. But in most
* This could be made faster by having another entry point in procarray.c,
* walking the PGPROC array only once for all the members. But in most
* cases nmembers should be small enough that it doesn't much matter.
*/
for (i = 0; i < nmembers; i++)