buf0buf.c:

  Do not set buffer pool to zero when we start up: that takes too much time for big buffer pools; Purify users must define UNIV_SET_MEM_TO_ZERO in univ.i to eliminate spurious (?) Purify warnings

innobase/buf/buf0buf.c

@@ -480,9 +480,6 @@ buf_pool_create(
 
 		block = buf_pool_get_nth_block(buf_pool, i);
 
-		/* Wipe contents of page to eliminate a Purify warning */
-		memset(block->frame, '\0', UNIV_PAGE_SIZE);
-
 		UT_LIST_ADD_FIRST(free, buf_pool->free, block);
 	}