Merge

include/my_base.h:
  Auto merged
include/my_global.h:
  Auto merged
include/my_sys.h:
  Auto merged
isam/test2.c:
  Auto merged
myisam/mi_check.c:
  Auto merged
myisam/mi_test2.c:
  Auto merged
myisam/myisamchk.c:
  Auto merged
myisam/myisamdef.h:
  Auto merged
mysql-test/r/func_group.result:
  Auto merged
sql/ha_myisam.cc:
  Auto merged
sql/handler.cc:
  Auto merged
sql/handler.h:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/set_var.h:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_test.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
sql/mysqld.cc:
  SCCS merged
sql/set_var.cc:
  SCCS merged

1 files changed, 67 insertions, 5 deletions

diff --git a/sql/set_var.h b/sql/set_var.h
index 752f275c9f2..16b2c1d5d37 100644
--- a/sql/set_var.h
+++ b/sql/set_var.h
@@ -30,6 +30,11 @@ class set_var;
 typedef struct system_variables SV;
 extern TYPELIB bool_typelib, delay_key_write_typelib, sql_mode_typelib;
 
+extern ulonglong dflt_key_buff_size;
+extern uint dflt_key_cache_block_size;
+extern uint dflt_key_cache_division_limit;
+extern uint dflt_key_cache_age_threshold;
+
 enum enum_var_type
 {
   OPT_DEFAULT, OPT_SESSION, OPT_GLOBAL
@@ -546,15 +551,71 @@ public:
   byte *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
 };
 
-class sys_var_key_buffer_size :public sys_var
+class sys_var_key_cache_param :public sys_var
 {
+protected:
+  uint offset;
 public:
-  sys_var_key_buffer_size(const char *name_arg)
+  sys_var_key_cache_param(const char *name_arg)
     :sys_var(name_arg)
-  {}
+  {
+    offset= 0;
+  }
+  byte *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
+};
+
+class sys_var_key_buffer_size :public sys_var_key_cache_param
+{
+public:
+  sys_var_key_buffer_size(const char *name_arg)
+    :sys_var_key_cache_param(name_arg)
+  {
+    offset= offsetof(KEY_CACHE_VAR, buff_size);
+  }
   bool update(THD *thd, set_var *var);
   SHOW_TYPE type() { return SHOW_LONGLONG; }
-  byte *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
+  bool check_default(enum_var_type type) { return 1; }
+  bool is_struct() { return 1; }
+};
+
+class sys_var_key_cache_block_size :public sys_var_key_cache_param
+{
+public:
+  sys_var_key_cache_block_size(const char *name_arg)
+    :sys_var_key_cache_param(name_arg)
+  {
+    offset= offsetof(KEY_CACHE_VAR, block_size);
+  }
+  bool update(THD *thd, set_var *var);
+  SHOW_TYPE type() { return SHOW_LONG; }
+  bool check_default(enum_var_type type) { return 1; }
+  bool is_struct() { return 1; }
+};
+
+class sys_var_key_cache_division_limit :public sys_var_key_cache_param
+{
+public:
+  sys_var_key_cache_division_limit(const char *name_arg)
+    :sys_var_key_cache_param(name_arg)
+  {
+    offset= offsetof(KEY_CACHE_VAR, division_limit);
+  }
+  bool update(THD *thd, set_var *var);
+  SHOW_TYPE type() { return SHOW_LONG; }
+  bool check_default(enum_var_type type) { return 1; }
+  bool is_struct() { return 1; }
+};
+
+class sys_var_key_cache_age_threshold :public sys_var_key_cache_param
+{
+public:
+  sys_var_key_cache_age_threshold(const char *name_arg)
+    :sys_var_key_cache_param(name_arg)
+  {
+    offset= offsetof(KEY_CACHE_VAR, age_threshold);
+  }
+  bool update(THD *thd, set_var *var);
+  SHOW_TYPE type() { return SHOW_LONG; }
   bool check_default(enum_var_type type) { return 1; }
   bool is_struct() { return 1; }
 };
@@ -785,5 +846,6 @@ gptr find_named(I_List<NAMED_LIST> *list, const char *name, uint length,
 void delete_elements(I_List<NAMED_LIST> *list, void (*free_element)(gptr));
 
 /* key_cache functions */
-KEY_CACHE *get_or_create_key_cache(const char *name, uint length);
+KEY_CACHE_VAR *get_or_create_key_cache(const char *name, uint length);
 void free_key_cache(gptr key_cache);
+bool process_key_caches(int (* func) (KEY_CACHE_VAR *));