Dear,

This is the many time my server crashes with the same problem, 120819 12:04:11 [ERROR] mysqld got signal 11 ;
This could be because you hit a bug etc.

CentOs 6.2 64Bits.
mariadb-5.5.25
Intel(R) Xeon(R) CPU E31240 @ 3.30GHz
16Go Ram
2 x SSD 128Go SanDisk
1300req/sec average for 3500 DB.

Last crash :

120819 12:04:11 [ERROR] 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.

To report this bug, see http://kb.askmonty.org/en/reporting-bugs

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.

Server version: 5.5.25-MariaDB-log
key_buffer_size=2122317824
read_buffer_size=131072
max_used_connections=425
max_threads=3002
thread_count=30
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 395976802 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x3b85cc0
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 = 0x7f01c4784d98 thread_stack 0x40000
??:0(my_print_stacktrace)[0xa6d3de]
??:0(handle_fatal_signal)[0x6c584b]
:0()[0x7f0274d334a0]
??:0(ha_maria::ft_init_ext(unsigned int, unsigned int, String*))[0x986eb0]
??:0(Item_func_match::init_search(bool))[0x7215f3]
??:0(Item_func_match::init_search(bool))[0x721535]
??:0(init_ftfuncs(THD*, st_select_lex*, bool))[0x53c3f8]
??:0(JOIN::optimize())[0x5cb95e]
??:0(mysql_select(THD*, Item**, TABLE_LIST, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x5d3fc2]
??:0(handle_select(THD*, LEX*, select_result*, unsigned long))[0x5d4bbd]
??:0(execute_sqlcom_select(THD*, TABLE_LIST*))[0x581fbc]
??:0(mysql_execute_command(THD*))[0x588ff0]
??:0(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x58b389]
??:0(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x58c688]
??:0(do_handle_one_connection(THD*))[0x640b63]
??:0(handle_one_connection)[0x640cac]
:0()[0x7f0274d2b7f1]
:0()[0x7f02736a1ccd]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f00aa191cd8): is an invalid pointer
Connection ID (thread ID): 434408348
Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=off

Old crash :

120714 23:37:45 [ERROR] 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.

To report this bug, see http://kb.askmonty.org/en/reporting-bugs

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.

Server version: 5.5.25-MariaDB-log
key_buffer_size=2122317824
read_buffer_size=131072
max_used_connections=133
max_threads=3002
thread_count=21
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 395976802 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x43d21b0
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 = 0x7f7034508d98 thread_stack 0x40000
??:0(my_print_stacktrace)[0xa6d3de]
??:0(handle_fatal_signal)[0x6c584b]
:0()[0x7f70d87ba4a0]
??:0(ha_maria::ft_init_ext(unsigned int, unsigned int, String*))[0x986eb0]
??:0(Item_func_match::init_search(bool))[0x7215f3]
??:0(Item_func_match::init_search(bool))[0x721535]
??:0(init_ftfuncs(THD*, st_select_lex*, bool))[0x53c3f8]
??:0(JOIN::optimize())[0x5cb95e]
??:0(mysql_select(THD*, Item**, TABLE_LIST, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x5d3fc2]
??:0(handle_select(THD*, LEX*, select_result*, unsigned long))[0x5d4bbd]
??:0(execute_sqlcom_select(THD*, TABLE_LIST*))[0x581fbc]
??:0(mysql_execute_command(THD*))[0x588ff0]
??:0(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x58b389]
??:0(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x58c688]
??:0(do_handle_one_connection(THD*))[0x640b63]
??:0(handle_one_connection)[0x640cac]
:0()[0x7f70d87b27f1]
:0()[0x7f70d7128ccd]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f6f0d121fb8): is an invalid pointer
Connection ID (thread ID): 60462379
Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_key$

Old Crash :

120716 23:54:48 [ERROR] 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.

To report this bug, see http://kb.askmonty.org/en/reporting-bugs

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.

Server version: 5.5.25-MariaDB-log
key_buffer_size=2122317824
read_buffer_size=131072
max_used_connections=101
max_threads=3002
thread_count=23
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 395976802 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x379e670
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 = 0x7f0f6c4cad98 thread_stack 0x40000
??:0(my_print_stacktrace)[0xa6d3de]
??:0(handle_fatal_signal)[0x6c584b]
:0()[0x7f103059b4a0]
??:0(ha_maria::ft_init_ext(unsigned int, unsigned int, String*))[0x986eb0]
??:0(Item_func_match::init_search(bool))[0x7215f3]
??:0(Item_func_match::init_search(bool))[0x721535]
??:0(init_ftfuncs(THD*, st_select_lex*, bool))[0x53c3f8]
??:0(JOIN::optimize())[0x5cb95e]
??:0(mysql_select(THD*, Item**, TABLE_LIST, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x5d3fc2]
??:0(handle_select(THD*, LEX*, select_result*, unsigned long))[0x5d4bbd]
??:0(execute_sqlcom_select(THD*, TABLE_LIST*))[0x581fbc]
??:0(mysql_execute_command(THD*))[0x588ff0]
??:0(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x58b389]
??:0(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x58c688]
??:0(do_handle_one_connection(THD*))[0x640b63]
??:0(handle_one_connection)[0x640cac]
:0()[0x7f10305937f1]
:0()[0x7f102ef09ccd]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f0e5994e648): is an invalid pointer
Connection ID (thread ID): 16992022
Status: NOT_KILLED