Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7ffff42d3700 (LWP 18093)] 0x0000000000c4c001 in get_partitioned_key_cache_statistics (keycache=0x7fffa8000150, partition_no=0, keycache_stats=0x7ffff42d03e0) at ./maria-5.5/mysys/mf_keycache.c:5758 5758 keycache_stats->blocks_used+= partition->blocks_used; (gdb) bt #0 0x0000000000c4c001 in get_partitioned_key_cache_statistics (keycache=0x7fffa8000150, partition_no=0, keycache_stats=0x7ffff42d03e0) at ./maria-5.5/mysys/mf_keycache.c:5758 #1 0x0000000000c4c73c in get_key_cache_statistics (keycache=0x1d09360, partition_no=0, key_cache_stats=0x7ffff42d03e0) at ./maria-5.5/mysys/mf_keycache.c:6328 #2 0x0000000000561ae2 in show_default_keycache (thd=0x30df0f0, var=0x7ffff42d0840, buff=0x7ffff42d03e0 "") at ./maria-5.5/sql/mysqld.cc:6873 #3 0x0000000000680c64 in show_status_array (thd=0x30df0f0, wild=0x0, variables=0x1d09bc8, value_type=OPT_GLOBAL, status_var=0x7ffff42d0950, prefix=0xd39753 "", table=0x7fffb8007888, ucase_names=false, cond=0x0) at ./maria-5.5/sql/sql_show.cc:2346 #4 0x0000000000690925 in fill_status (thd=0x30df0f0, tables=0x7fffb8006f38, cond=0x0) at ./maria-5.5/sql/sql_show.cc:6651 #5 0x0000000000692b4d in do_fill_table (thd=0x30df0f0, table_list=0x7fffb8006f38, join_table=0x7fffb801f908) at ./maria-5.5/sql/sql_show.cc:7395 #6 0x0000000000692f64 in get_schema_tables_result (join=0x7fffb801e968, executed_place=PROCESSED_BY_JOIN_EXEC) at ./maria-5.5/sql/sql_show.cc:7502 #7 0x000000000063fa75 in JOIN::exec (this=0x7fffb801e968) at ./maria-5.5/sql/sql_select.cc:2286 #8 0x0000000000642290 in mysql_select (thd=0x30df0f0, rref_pointer_array=0x30e1e08, tables=0x7fffb8006f38, wild_num=0, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2684652288, result=0x7fffb800f498, unit=0x30e1468, select_lex=0x30e1b60) at ./maria-5.5/sql/sql_select.cc:3014 #9 0x000000000063928d in handle_select (thd=0x30df0f0, lex=0x30e13b8, result=0x7fffb800f498, setup_tables_done_option=0) at ./maria-5.5/sql/sql_select.cc:311 #10 0x0000000000611faa in execute_sqlcom_select (thd=0x30df0f0, all_tables=0x7fffb8006f38) at ./maria-5.5/sql/sql_parse.cc:4616 #11 0x00000000006120f2 in execute_show_status (thd=0x30df0f0, all_tables=0x7fffb8006f38) at ./maria-5.5/sql/sql_parse.cc:4636 #12 0x000000000060af09 in mysql_execute_command (thd=0x30df0f0) at ./maria-5.5/sql/sql_parse.cc:2143 #13 0x00000000006147cf in mysql_parse (thd=0x30df0f0, rawbuf=0x7fffb8009c88 "/*don't kill*/ show /*!50010 global*/ status", length=44, parser_state=0x7ffff42d2620) at ./maria-5.5/sql/sql_parse.cc:5731 #14 0x000000000060866a in dispatch_command (command=COM_QUERY, thd=0x30df0f0, packet=0x30e2bd1 "/*don't kill*/ show /*!50010 global*/ status", packet_length=44) at ./maria-5.5/sql/sql_parse.cc:1055 #15 0x000000000060793d in do_command (thd=0x30df0f0) at ./maria-5.5/sql/sql_parse.cc:794 #16 0x0000000000708a6f in do_handle_one_connection (thd_arg=0x30df0f0) at ./maria-5.5/sql/sql_connect.cc:1253 #17 0x0000000000708532 in handle_one_connection (arg=0x30df0f0) at ./maria-5.5/sql/sql_connect.cc:1168 #18 0x00000030b8806ccb in start_thread (arg=0x7ffff42d3700) at pthread_create.c:301 #19 0x00000030b84e0c2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115 Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7ffff7651700 (LWP 18131)] 0x0000000000c4a882 in flush_simple_key_cache_blocks (keycache=0x0, file=32, file_extra=0x0, type=FLUSH_RELEASE) at ./maria-5.5/mysys/mf_keycache.c:4355 4355 if (!keycache->key_cache_inited) (gdb) bt #0 0x0000000000c4a882 in flush_simple_key_cache_blocks (keycache=0x0, file=32, file_extra=0x0, type=FLUSH_RELEASE) at ./maria-5.5/mysys/mf_keycache.c:4355 #1 0x0000000000c4be48 in flush_partitioned_key_cache_blocks (keycache=0x7fffc000d6f0, file=32, file_extra=0x7fffc400d890, type=FLUSH_RELEASE) at ./maria-5.5/mysys/mf_keycache.c:5662 #2 0x0000000000c4c6a3 in flush_key_blocks (keycache=0x1d09360, file=32, file_extra=0x7fffc400d890, type=FLUSH_RELEASE) at ./maria-5.5/mysys/mf_keycache.c:6261 #3 0x0000000000bda6ec in mi_preload (info=0x7fffc400e540, key_map=127, ignore_leaves=0 '\000') at ./maria-5.5/storage/myisam/mi_preload.c:79 #4 0x0000000000ba0b30 in ha_myisam::preload_keys (this=0x7fffc400ba18, thd=0x30d3f10, check_opt=0x0) at ./maria-5.5/storage/myisam/ha_myisam.cc:1273 #5 0x0000000000718958 in mysql_admin_table (thd=0x30d3f10, tables=0x7fffa0200698, check_opt=0x0, operator_name=0xd549f3 "preload_keys", lock_type=TL_READ_NO_INSERT, open_for_modify=false, repair_table_use_frm=false, extra_open_options=0, prepare_func=0, operator_func=&virtual table offset 488, view_operator_func=0) at ./maria-5.5/sql/sql_admin.cc:643 #6 0x0000000000719c09 in mysql_preload_keys (thd=0x30d3f10, tables=0x7fffa0200698) at ./maria-5.5/sql/sql_admin.cc:981 #7 0x000000000060b524 in mysql_execute_command (thd=0x30d3f10) at ./maria-5.5/sql/sql_parse.cc:2313 #8 0x00000000006147cf in mysql_parse (thd=0x30d3f10, rawbuf=0x7fffc4008178 "load index into cache t1", length=24, parser_state=0x7ffff7650620) at ./maria-5.5/sql/sql_parse.cc:5731 #9 0x000000000060866a in dispatch_command (command=COM_QUERY, thd=0x30d3f10, packet=0x30d8d31 "", packet_length=24) at ./maria-5.5/sql/sql_parse.cc:1055 #10 0x000000000060793d in do_command (thd=0x30d3f10) at ./maria-5.5/sql/sql_parse.cc:794 #11 0x0000000000708a6f in do_handle_one_connection (thd_arg=0x30d3f10) at ./maria-5.5/sql/sql_connect.cc:1253 #12 0x0000000000708532 in handle_one_connection (arg=0x30d3f10) at ./maria-5.5/sql/sql_connect.cc:1168 #13 0x00000030b8806ccb in start_thread (arg=0x7ffff7651700) at pthread_create.c:301 #14 0x00000030b84e0c2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115