Tested with 5.5.30-rel30.1-465.squeeze on Debian Squeeze with the same result: mysql> select * from information_schema.INNODB_BUFFER_PAGE; ERROR 2013 (HY000): Lost connection to MySQL server during query 07:18:02 UTC - mysqld got signal 11 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. Please help us make Percona Server better by reporting any bugs at http://bugs.percona.com/ key_buffer_size=268435456 read_buffer_size=2097152 max_used_connections=1 max_threads=112 thread_count=1 connection_count=1 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 722257 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x17d6b10 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 7f6236f0ae98 thread_stack 0x30000 /usr/sbin/mysqld(my_print_stacktrace+0x35)[0x7cc825] /usr/sbin/mysqld(handle_fatal_signal+0x4b4)[0x69bf74] /lib/libpthread.so.0(+0xef60)[0x7f6248fc1f60] /usr/sbin/mysqld[0x807199] /usr/sbin/mysqld(_Z24get_schema_tables_resultP4JOIN23enum_schema_table_state+0x25e)[0x5daf4e] /usr/sbin/mysqld(_ZN4JOIN4execEv+0x4dd)[0x5d59bd] /usr/sbin/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x12c)[0x5d790c] /usr/sbin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x1cd)[0x5d83cd] /usr/sbin/mysqld[0x595002] /usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x1543)[0x598e53] /usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x333)[0x59c593] /usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x15cd)[0x59dc0d] /usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0xd7)[0x63aac7] /usr/sbin/mysqld(handle_one_connection+0x51)[0x63ac01] /lib/libpthread.so.0(+0x68ba)[0x7f6248fb98ba] /lib/libc.so.6(clone+0x6d)[0x7f624825b02d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (1832580): select * from information_schema.INNODB_BUFFER_PAGE Connection ID (thread ID): 9 Status: NOT_KILLED You may download the Percona Server operations manual by visiting http://www.percona.com/software/percona-server/. You may find information in the manual which will help you identify the cause of the crash. 130409 07:18:02 mysqld_safe Number of processes running now: 0 130409 07:18:02 mysqld_safe mysqld restarted 130409 7:18:02 [Note] Plugin 'FEDERATED' is disabled. 130409 7:18:02 [Note] Plugin 'InnoDB' is disabled. 130409 7:18:02 [Warning] 'user' entry 'root@robocop' ignored in --skip-name-resolve mode. 130409 7:18:02 [Note] Event Scheduler: Loaded 0 events 130409 7:18:02 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.5.30-30.1' socket: '/var/run/mysqld/mysqld118.sock' port: 3306 Percona Server (GPL), Release 30.1