110607 9:19:43 - 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. key_buffer_size=25769803776 read_buffer_size=67108864 max_used_connections=8 max_threads=151 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 = 37537463 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x14a95f20 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 = 0x7f5231f82e20 thread_stack 0x40000 /usr/local/mysql/bin/mysqld(my_print_stacktrace+0x39)[0x796869] /usr/local/mysql/bin/mysqld(handle_segfault+0x380)[0x4fcea0] /lib/libpthread.so.0(+0xf8f0)[0x7f5231c278f0] /usr/local/mysql/bin/mysqld[0x925e08] /usr/local/mysql/bin/mysqld[0x925fb8] /usr/local/mysql/bin/mysqld[0x9260fb] /usr/local/mysql/bin/mysqld[0x92615b] /usr/local/mysql/bin/mysqld(lf_hash_search+0x159)[0x9262c9] /usr/local/mysql/bin/mysqld(_Z19find_or_create_fileP10PFS_threadP14PFS_file_classPKcj+0x1b2)[0x908b82] /usr/local/mysql/bin/mysqld[0x9125ce] /usr/local/mysql/bin/mysqld[0x84d6ad] /usr/local/mysql/bin/mysqld[0x84dc6a] /usr/local/mysql/bin/mysqld[0x8518a6] /usr/local/mysql/bin/mysqld[0x83188e] /usr/local/mysql/bin/mysqld[0x831da7] /usr/local/mysql/bin/mysqld[0x8237c0] /usr/local/mysql/bin/mysqld[0x803366] /usr/local/mysql/bin/mysqld[0x803def] /usr/local/mysql/bin/mysqld[0x8397aa] /usr/local/mysql/bin/mysqld[0x842831] /usr/local/mysql/bin/mysqld[0x7b1f61] /usr/local/mysql/bin/mysqld(_ZN7handler7ha_openEP5TABLEPKcii+0x3e)[0x669d8e] /usr/local/mysql/bin/mysqld(_ZN12ha_partition4openEPKcij+0x1e7)[0x91f6c7] /usr/local/mysql/bin/mysqld(_ZN7handler7ha_openEP5TABLEPKcii+0x3e)[0x669d8e] /usr/local/mysql/bin/mysqld(_Z21open_table_from_shareP3THDP11TABLE_SHAREPKcjjjP5TABLEb+0x5bc)[0x5eb51c] /usr/local/mysql/bin/mysqld(_Z10open_tableP3THDP10TABLE_LISTP11st_mem_rootP18Open_table_context+0xcb4)[0x540404] /usr/local/mysql/bin/mysqld(_Z11open_tablesP3THDPP10TABLE_LISTPjjP19Prelocking_strategy+0x5ac)[0x54121c] /usr/local/mysql/bin/mysqld(_Z20open_and_lock_tablesP3THDP10TABLE_LISTbjP19Prelocking_strategy+0x44)[0x5419d4] /usr/local/mysql/bin/mysqld(_Z17mysql_alter_tableP3THDPcS1_P24st_ha_create_informationP10TABLE_LISTP10Alter_infojP8st_orderb+0x1bb)[0x5d3ceb] /usr/local/mysql/bin/mysqld(_ZN21Alter_table_statement7executeEP3THD+0x449)[0x778b59] /usr/local/mysql/bin/mysqld(_Z21mysql_execute_commandP3THD+0x1618)[0x575c88] /usr/local/mysql/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x15a)[0x578d0a] /usr/local/mysql/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1321)[0x57a881] /usr/local/mysql/bin/mysqld(_Z24do_handle_one_connectionP3THD+0x337)[0x60e047] /usr/local/mysql/bin/mysqld(handle_one_connection+0x54)[0x60e0b4] /usr/local/mysql/bin/mysqld(pfs_spawn_thread+0x5b)[0x91297b] /lib/libpthread.so.0(+0x69ca)[0x7f5231c1e9ca] /lib/libc.so.6(clone+0x6d)[0x7f5230eb170d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (0x7f493c4d21b0): is an invalid pointer Connection ID (thread ID): 25 Status: NOT_KILLED The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains information that should help you find out what is causing the crash. Writing a core file Segmentation fault 110607 09:19:45 mysqld_safe Number of processes running now: 0 110607 09:19:45 mysqld_safe mysqld restarted 110608 5:41:44 - 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. key_buffer_size=25769803776 read_buffer_size=67108864 max_used_connections=10 max_threads=151 thread_count=5 connection_count=5 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 37537462 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x7fa5f4432380 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 = 0x7fa5f807ee20 thread_stack 0x40000 /usr/local/mysql/bin/mysqld(my_print_stacktrace+0x39)[0x796d89] /usr/local/mysql/bin/mysqld(handle_segfault+0x380)[0x4fd110] /lib/libpthread.so.0(+0xf8f0)[0x7fb55ca318f0] /lib/libc.so.6(memcpy+0xd2)[0x7fb55bc5bd62] /usr/local/mysql/bin/mysqld(mi_mmap_pread+0x196)[0x8d6186] /usr/local/mysql/bin/mysqld(_mi_read_static_record+0x62)[0x8eade2] /usr/local/mysql/bin/mysqld(mi_rkey+0x2d1)[0x8facd1] /usr/local/mysql/bin/mysqld(_ZN9ha_myisam14index_read_mapEPhPKhm16ha_rkey_function+0x53)[0x8bc143] /usr/local/mysql/bin/mysqld(_ZN12ha_partition36handle_unordered_scan_next_partitionEPh+0x1a1)[0x91b801] /usr/local/mysql/bin/mysqld[0x591012] /usr/local/mysql/bin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x79)[0x597229] /usr/local/mysql/bin/mysqld[0x59ca4d] /usr/local/mysql/bin/mysqld(_ZN4JOIN4execEv+0x925)[0x5b0505] /usr/local/mysql/bin/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x1c3)[0x5ac253] /usr/local/mysql/bin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x179)[0x5b1fb9] /usr/local/mysql/bin/mysqld[0x5703d1] /usr/local/mysql/bin/mysqld(_Z21mysql_execute_commandP3THD+0x226f)[0x5759ff] /usr/local/mysql/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x15a)[0x577dea] /usr/local/mysql/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1321)[0x579961] /usr/local/mysql/bin/mysqld(_Z24do_handle_one_connectionP3THD+0x337)[0x60d917] /usr/local/mysql/bin/mysqld(handle_one_connection+0x54)[0x60d984] /usr/local/mysql/bin/mysqld(pfs_spawn_thread+0x5b)[0x909b8b] /lib/libpthread.so.0(+0x69ca)[0x7fb55ca289ca] /lib/libc.so.6(clone+0x6d)[0x7fb55bcbb70d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (0x7fa5fc093400): is an invalid pointer Connection ID (thread ID): 85 Status: NOT_KILLED The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains information that should help you find out what is causing the crash. Writing a core file Segmentation fault 110608 05:41:48 mysqld_safe Number of processes running now: 0 110608 05:41:48 mysqld_safe mysqld restarted