1. LocalBufferSync(): set nextFreeLocalBuf to 0 - we're freeing

   all local buffers @ xact commit, so accordingly nextFreeLocalBuf
   is first local buffer now.
   It helps to avoid unnecessary local buffer allocations in LocalBufferAlloc()
   latter ("memmory leaks" in 'order by').
2. ResetLocalBufferPool() lost allocated local buffers:

   memset(LocalBufferDescriptors, 0, sizeof(BufferDesc) * NLocBuffer);

   (local buffers leak @ xact aborts).

diff --git a/src/backend/storage/buffer/localbuf.c b/src/backend/storage/buffer/localbuf.c
index 3e7f7e2..0081b5f 100644 (file)
--- a/src/backend/storage/buffer/localbuf.c
+++ b/src/backend/storage/buffer/localbuf.c
@@ -15,7 +15,7 @@
  *
  *
  * IDENTIFICATION
- *    $Header: /cvsroot/pgsql/src/backend/storage/buffer/localbuf.c,v 1.6 1997/04/18 02:53:37 vadim Exp $
+ *    $Header: /cvsroot/pgsql/src/backend/storage/buffer/localbuf.c,v 1.7 1997/05/20 11:30:32 vadim Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -273,6 +273,7 @@ LocalBufferSync(void)
     }
 
     memset(LocalRefCount, 0, sizeof(long) * NLocBuffer);
+    nextFreeLocalBuf = 0;
 }
 
 void
@@ -280,15 +281,15 @@ ResetLocalBufferPool(void)
 {
     int i;
 
-    memset(LocalBufferDescriptors, 0, sizeof(BufferDesc) * NLocBuffer);
-    nextFreeLocalBuf = 0;
-
-    for (i = 0; i < NLocBuffer; i++) {
+    for (i = 0; i < NLocBuffer; i++)
+    {
        BufferDesc *buf = &LocalBufferDescriptors[i];
 
-       /* just like InitLocalBuffer() */
+       buf->tag.relId.relId = InvalidOid;
+       buf->flags &= ~BM_DIRTY;
        buf->buf_id = - i - 2;  
     }
 
     memset(LocalRefCount, 0, sizeof(long) * NLocBuffer);
+    nextFreeLocalBuf = 0;
 }