Get rid of slru.c's hardwired insistence on a fixed number of slots per

SLRU area.  The number of slots is still a compile-time constant (someday
we might want to change that), but at least it's a different constant for
each SLRU area.  Increase number of subtrans buffers to 32 based on
experimentation with a heavily subtrans-bashing test case, and increase
number of multixact member buffers to 16, since it's obviously silly for
it not to be at least twice the number of multixact offset buffers.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/include/access/clog.h b/src/include/access/clog.h
index f04eb02a58d..3eda52a12ab 100644
--- a/src/include/access/clog.h
+++ b/src/include/access/clog.h
@@ -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 1.14 2005/08/20 23:26:29 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/access/clog.h,v 1.15 2005/12/06 23:08:34 tgl Exp $
  */
 #ifndef CLOG_H
 #define CLOG_H
@@ -28,6 +28,10 @@ typedef int XidStatus;
 #define TRANSACTION_STATUS_SUB_COMMITTED	0x03
 
 
+/* Number of SLRU buffers to use for clog */
+#define NUM_CLOG_BUFFERS	8
+
+
 extern void TransactionIdSetStatus(TransactionId xid, XidStatus status);
 extern XidStatus TransactionIdGetStatus(TransactionId xid);