=== modified file 'storage/innobase/buf/buf0buf.cc'
--- storage/innobase/buf/buf0buf.cc	2013-06-10 20:44:22 +0000
+++ storage/innobase/buf/buf0buf.cc	2013-08-27 07:29:24 +0000
@@ -1265,6 +1265,8 @@
 		buf_pool->instance_no = instance_no;
 		buf_pool->old_pool_size = buf_pool_size;
 		buf_pool->curr_size = chunk->size;
+		buf_pool->read_ahead_area
+			= ut_min(64, ut_2_power_up(buf_pool->curr_size / 32));
 		buf_pool->curr_pool_size = buf_pool->curr_size * UNIV_PAGE_SIZE;
 
 		/* Number of locks protecting page_hash must be a

=== modified file 'storage/innobase/include/buf0buf.h'
--- storage/innobase/include/buf0buf.h	2013-04-30 11:45:16 +0000
+++ storage/innobase/include/buf0buf.h	2013-08-27 07:29:24 +0000
@@ -1816,6 +1816,9 @@
 	ulint		n_chunks;	/*!< number of buffer pool chunks */
 	buf_chunk_t*	chunks;		/*!< buffer pool chunks */
 	ulint		curr_size;	/*!< current pool size in pages */
+	ulint		read_ahead_area;/*!< size in pages of the area which
+					the read-ahead algorithms read if
+					invoked */
 	hash_table_t*	page_hash;	/*!< hash table of buf_page_t or
 					buf_block_t file pages,
 					buf_page_in_file() == TRUE,

=== modified file 'storage/innobase/include/buf0rea.h'
--- storage/innobase/include/buf0rea.h	2013-06-10 20:44:22 +0000
+++ storage/innobase/include/buf0rea.h	2013-08-27 07:29:24 +0000
@@ -161,8 +161,7 @@
 
 /** The size in pages of the area which the read-ahead algorithms read if
 invoked */
-#define	BUF_READ_AHEAD_AREA(b)					\
-	ut_min(64, ut_2_power_up((b)->curr_size / 32))
+#define	BUF_READ_AHEAD_AREA(b)		((b)->read_ahead_area)
 
 /** @name Modes used in read-ahead @{ */
 /** read only pages belonging to the insert buffer tree */