Replace implementation of pg_log as a relation accessed through the

buffer manager with 'pg_clog', a specialized access method modeled
on pg_xlog.  This simplifies startup (don't need to play games to
open pg_log; among other things, OverrideTransactionSystem goes away),
should improve performance a little, and opens the door to recycling
commit log space by removing no-longer-needed segments of the commit
log.  Actual recycling is not there yet, but I felt I should commit
this part separately since it'd still be useful if we chose not to
do transaction ID wraparound.

1 files changed, 5 insertions, 2 deletions

diff --git a/src/backend/storage/ipc/ipci.c b/src/backend/storage/ipc/ipci.c
index 75736c8f240..06988baf345 100644
--- a/src/backend/storage/ipc/ipci.c
+++ b/src/backend/storage/ipc/ipci.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipci.c,v 1.41 2001/06/27 23:31:39 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipci.c,v 1.42 2001/08/25 18:52:42 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -17,6 +17,7 @@
 #include <sys/types.h>
 
 #include "miscadmin.h"
+#include "access/clog.h"
 #include "access/xlog.h"
 #include "storage/bufmgr.h"
 #include "storage/freespace.h"
@@ -51,6 +52,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int maxBackends)
 	size = BufferShmemSize();
 	size += LockShmemSize(maxBackends);
 	size += XLOGShmemSize();
+	size += CLOGShmemSize();
 	size += SLockShmemSize();
 	size += SInvalShmemSize(maxBackends);
 	size += FreeSpaceShmemSize();
@@ -80,9 +82,10 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int maxBackends)
 	InitShmemAllocation(seghdr);
 
 	/*
-	 * Set up xlog and buffers
+	 * Set up xlog, clog, and buffers
 	 */
 	XLOGShmemInit();
+	CLOGShmemInit();
 	InitBufferPool();
 
 	/*