my_alloc.c

- Changed 0x%lx -> %p
array.c:
- Static (preallocated) buffer can now be anywhere
my_sys.h
- Define MY_INIT_BUFFER_USED
sql_delete.cc & sql_lex.cc
- Use memroot when allocating classes (avoids call to current_thd)
sql_explain.h:
- Use preallocated buffers
sql_explain.cc:
- Use preallocated buffers and memroot
sql_select.cc:
- Use multi_alloc_root() instead of many alloc_root()
- Update calls to Explain

mysql-test/suite/sys_vars/r/sysvars_server_notembedded.result

@@ -3116,10 +3116,10 @@ ENUM_VALUE_LIST	NULL
 READ_ONLY	NO
 COMMAND_LINE_ARGUMENT	NULL
 VARIABLE_NAME	QUERY_ALLOC_BLOCK_SIZE
-SESSION_VALUE	8192
-GLOBAL_VALUE	8192
+SESSION_VALUE	16384
+GLOBAL_VALUE	16384
 GLOBAL_VALUE_ORIGIN	COMPILE-TIME
-DEFAULT_VALUE	8192
+DEFAULT_VALUE	16384
 VARIABLE_SCOPE	SESSION
 VARIABLE_TYPE	BIGINT UNSIGNED
 VARIABLE_COMMENT	Allocation block size for query parsing and execution
@@ -3214,14 +3214,14 @@ ENUM_VALUE_LIST	OFF,ON
 READ_ONLY	NO
 COMMAND_LINE_ARGUMENT	OPTIONAL
 VARIABLE_NAME	QUERY_PREALLOC_SIZE
-SESSION_VALUE	8192
-GLOBAL_VALUE	8192
+SESSION_VALUE	24576
+GLOBAL_VALUE	24576
 GLOBAL_VALUE_ORIGIN	COMPILE-TIME
-DEFAULT_VALUE	8192
+DEFAULT_VALUE	24576
 VARIABLE_SCOPE	SESSION
 VARIABLE_TYPE	BIGINT UNSIGNED
 VARIABLE_COMMENT	Persistent buffer for query parsing and execution
-NUMERIC_MIN_VALUE	8192
+NUMERIC_MIN_VALUE	1024
 NUMERIC_MAX_VALUE	4294967295
 NUMERIC_BLOCK_SIZE	1024
 ENUM_VALUE_LIST	NULL