Turn all new features off by default.

storage/innobase/handler/ha_innodb.cc

@@ -16591,8 +16591,8 @@ static MYSQL_SYSVAR_BOOL(compress_index_pages, srv_page_compress_index_pages,
 
 static MYSQL_SYSVAR_BOOL(use_trim, srv_use_trim,
   PLUGIN_VAR_OPCMDARG,
-  "Use trim.",
-  NULL, NULL, TRUE);
+  "Use trim. Default FALSE.",
+  NULL, NULL, FALSE);
 
 #ifdef HAVE_LZ4
 static MYSQL_SYSVAR_BOOL(use_lz4, srv_use_lz4,
@@ -16612,8 +16612,8 @@ static MYSQL_SYSVAR_LONG(mtflush_threads, srv_mtflush_threads,
 
 static MYSQL_SYSVAR_BOOL(use_mtflush, srv_use_mtflush,
   PLUGIN_VAR_OPCMDARG ,
-  "Use multi-threaded flush. Default TRUE.",
-  NULL, NULL, TRUE);
+  "Use multi-threaded flush. Default FALSE.",
+  NULL, NULL, FALSE);
 
 static struct st_mysql_sys_var* innobase_system_variables[]= {
   MYSQL_SYSVAR(additional_mem_pool_size),

storage/innobase/srv/srv0srv.cc

@@ -152,7 +152,7 @@ UNIV_INTERN my_bool	srv_page_compress_index_pages = FALSE;
 UNIV_INTERN long	srv_trim_pct = 100;
 /* If this flag is TRUE, then we will use fallocate(PUCH_HOLE)
 to the pages */
-UNIV_INTERN my_bool	srv_use_trim = TRUE;
+UNIV_INTERN my_bool	srv_use_trim = FALSE;
 /* If this flag is TRUE, then we will use posix fallocate for file extentsion */
 UNIV_INTERN my_bool	srv_use_posix_fallocate = FALSE;
 /* If this flag is TRUE, then we disable doublewrite buffer */
@@ -162,7 +162,7 @@ UNIV_INTERN my_bool	srv_use_lz4                     = FALSE;
 /* Number of threads used for multi-threaded flush */
 UNIV_INTERN long srv_mtflush_threads = MTFLUSH_DEFAULT_WORKER;
 /* If this flag is TRUE, then we will use multi threaded flush. */
-UNIV_INTERN my_bool	srv_use_mtflush                 = TRUE;
+UNIV_INTERN my_bool	srv_use_mtflush                 = FALSE;
 
 #ifdef __WIN__
 /* Windows native condition variables. We use runtime loading / function

storage/xtradb/handler/ha_innodb.cc

@@ -17952,8 +17952,8 @@ static MYSQL_SYSVAR_BOOL(compress_index_pages, srv_page_compress_index_pages,
 
 static MYSQL_SYSVAR_BOOL(use_trim, srv_use_trim,
   PLUGIN_VAR_OPCMDARG,
-  "Use trim.",
-  NULL, NULL, TRUE);
+  "Use trim. Default FALSE.",
+  NULL, NULL, FALSE);
 
 #ifdef HAVE_LZ4
 static MYSQL_SYSVAR_BOOL(use_lz4, srv_use_lz4,
@@ -17973,8 +17973,8 @@ static MYSQL_SYSVAR_LONG(mtflush_threads, srv_mtflush_threads,
 
 static MYSQL_SYSVAR_BOOL(use_mtflush, srv_use_mtflush,
   PLUGIN_VAR_OPCMDARG ,
-  "Use multi-threaded flush. Default TRUE.",
-  NULL, NULL, TRUE);
+  "Use multi-threaded flush. Default FALSE.",
+  NULL, NULL, FALSE);
 
 static struct st_mysql_sys_var* innobase_system_variables[]= {
   MYSQL_SYSVAR(log_block_size),

storage/xtradb/srv/srv0srv.cc

@@ -170,7 +170,7 @@ level is set for the table*/
 UNIV_INTERN long        srv_compress_zlib_level         = 6;
 /* If this flag is TRUE, then we will use fallocate(PUCH_HOLE)
 to the pages */
-UNIV_INTERN my_bool     srv_use_trim                    = TRUE;
+UNIV_INTERN my_bool     srv_use_trim                    = FALSE;
 /* If this flag is TRUE, then we will use posix fallocate for file extentsion */
 UNIV_INTERN my_bool     srv_use_posix_fallocate         = FALSE;
 /* If this flag is TRUE, then we disable doublewrite buffer */
@@ -180,7 +180,7 @@ UNIV_INTERN my_bool	srv_use_lz4                     = FALSE;
 /* Number of threads used for multi-threaded flush */
 UNIV_INTERN long srv_mtflush_threads = MTFLUSH_DEFAULT_WORKER;
 /* If this flag is TRUE, then we will use multi threaded flush. */
-UNIV_INTERN my_bool	srv_use_mtflush                 = TRUE;
+UNIV_INTERN my_bool	srv_use_mtflush                 = FALSE;
 
 #ifdef __WIN__
 /* Windows native condition variables. We use runtime loading / function