Merge work:/home/bk/mysql-4.0 into hundin.mysql.fi:/my/bk/mysql-4.0

BitKeeper/etc/logging_ok:
  auto-union
sql/mysqld.cc:
  Auto merged

1 files changed, 11 insertions, 0 deletions

diff --git a/heap/heapdef.h b/heap/heapdef.h
index bdd7de45370..ef55cf5efd2 100644
--- a/heap/heapdef.h
+++ b/heap/heapdef.h
@@ -22,6 +22,17 @@
 #endif
 #include "heap.h"			/* Structs & some defines */
 
+/*
+  When allocating keys /rows in the internal block structure, do it
+  within the following boundaries.
+
+  The challenge is to find the balance between allocate as few blocks
+  as possible and keep memory consumption down.
+*/
+
+#define HP_MIN_RECORDS_IN_BLOCK 16
+#define HP_MAX_RECORDS_IN_BLOCK 8192
+
 	/* Some extern variables */
 
 extern LIST *heap_open_list,*heap_share_list;