Merge sita.local:/Users/tsmith/m/bk/50-5.0.48

into  sita.local:/Users/tsmith/m/bk/maint/50

sql/ha_innodb.cc

@@ -174,6 +174,7 @@ my_bool	innobase_file_per_table			= FALSE;
 my_bool innobase_locks_unsafe_for_binlog        = FALSE;
 my_bool innobase_rollback_on_timeout		= FALSE;
 my_bool innobase_create_status_file		= FALSE;
+my_bool innobase_adaptive_hash_index		= TRUE;
 
 static char *internal_innobase_data_file_path	= NULL;
 
@@ -1376,6 +1377,8 @@ innobase_init(void)
 	srv_use_doublewrite_buf = (ibool) innobase_use_doublewrite;
 	srv_use_checksums = (ibool) innobase_use_checksums;
 
+	srv_use_adaptive_hash_indexes = (ibool) innobase_adaptive_hash_index;
+
 	os_use_large_pages = (ibool) innobase_use_large_pages;
 	os_large_page_size = (ulint) innobase_large_page_size;
 

sql/ha_innodb.h

@@ -217,7 +217,8 @@ extern my_bool innobase_log_archive,
                innobase_use_native_aio,
 	       innobase_file_per_table, innobase_locks_unsafe_for_binlog,
 	       innobase_rollback_on_timeout,
-               innobase_create_status_file;
+               innobase_create_status_file,
+               innobase_adaptive_hash_index;
 extern my_bool innobase_very_fast_shutdown; /* set this to 1 just before
 					    calling innobase_end() if you want
 					    InnoDB to shut down without

sql/mysqld.cc

@@ -4842,7 +4842,8 @@ enum options_mysqld
   OPT_MERGE,
   OPT_INNODB_ROLLBACK_ON_TIMEOUT,
   OPT_SECURE_FILE_PRIV,
-  OPT_KEEP_FILES_ON_CREATE
+  OPT_KEEP_FILES_ON_CREATE,
+  OPT_INNODB_ADAPTIVE_HASH_INDEX
 };
 
 
@@ -5070,6 +5071,12 @@ Disable with --skip-innodb-checksums.", (gptr*) &innobase_use_checksums,
    "The common part for InnoDB table spaces.", (gptr*) &innobase_data_home_dir,
    (gptr*) &innobase_data_home_dir, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0,
    0},
+  {"innodb_adaptive_hash_index", OPT_INNODB_ADAPTIVE_HASH_INDEX,
+   "Enable InnoDB adaptive hash index (enabled by default).  "
+   "Disable with --skip-innodb-adaptive-hash-index.",
+   (gptr*) &innobase_adaptive_hash_index,
+   (gptr*) &innobase_adaptive_hash_index,
+   0, GET_BOOL, NO_ARG, 1, 0, 0, 0, 0, 0},
   {"innodb_doublewrite", OPT_INNODB_DOUBLEWRITE, "Enable InnoDB doublewrite buffer (enabled by default). \
 Disable with --skip-innodb-doublewrite.", (gptr*) &innobase_use_doublewrite,
    (gptr*) &innobase_use_doublewrite, 0, GET_BOOL, NO_ARG, 1, 0, 0, 0, 0, 0},

sql/set_var.cc

@@ -901,6 +901,7 @@ struct show_var_st init_vars[]= {
   {sys_innodb_concurrency_tickets.name, (char*) &sys_innodb_concurrency_tickets, SHOW_SYS},
   {"innodb_data_file_path", (char*) &innobase_data_file_path,	    SHOW_CHAR_PTR},
   {"innodb_data_home_dir",  (char*) &innobase_data_home_dir,	    SHOW_CHAR_PTR},
+  {"innodb_adaptive_hash_index", (char*) &innobase_adaptive_hash_index, SHOW_MY_BOOL},
   {"innodb_doublewrite", (char*) &innobase_use_doublewrite, SHOW_MY_BOOL},
   {sys_innodb_fast_shutdown.name,(char*) &sys_innodb_fast_shutdown, SHOW_SYS},
   {"innodb_file_io_threads", (char*) &innobase_file_io_threads, SHOW_LONG },