Merge with 3.23.54

BitKeeper/etc/logging_ok:
  auto-union
BitKeeper/deleted/.del-LICENSE~4cfaff8de837acb8:
  Auto merged
BitKeeper/deleted/.del-MySQLEULA.txt:
  Delete: Docs/MySQLEULA.txt
BitKeeper/deleted/.del-global.h~e80d28157acfdcb5:
  Auto merged
Build-tools/mysql-copyright-2:
  Auto merged
Build-tools/mysql-copyright:
  Auto merged
heap/heapdef.h:
  Auto merged
heap/hp_open.c:
  Auto merged
innobase/btr/btr0cur.c:
  Auto merged
innobase/lock/lock0lock.c:
  Auto merged
innobase/os/os0file.c:
  Auto merged
innobase/os/os0thread.c:
  Auto merged
myisam/mi_open.c:
  Auto merged
mysql-test/Makefile.am:
  Auto merged
mysql-test/t/null_key.test:
  Auto merged
mysys/safemalloc.c:
  Auto merged
scripts/make_binary_distribution.sh:
  Auto merged
scripts/mysqld_safe.sh:
  Auto merged
scripts/mysqlhotcopy.sh:
  Auto merged
sql/field.h:
  Auto merged
sql/field_conv.cc:
  Auto merged
sql/ha_innodb.h:
  Auto merged
sql/item.cc:
  Auto merged
sql/sql_db.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/table.cc:
  Auto merged
tests/grant.res:
  Auto merged
Build-tools/Do-compile:
  merge
Docs/manual.texi:
  merge
configure.in:
  merge
mysql-test/r/distinct.result:
  merge
mysql-test/r/null_key.result:
  merge
sql/ha_innodb.cc:
  merge
sql/item.h:
  merge
sql/log.cc:
  merge
sql/mysqld.cc:
  merge
support-files/mysql.spec.sh:
  merge

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;