A segfault on suda's mysqld took us down for a couple minutes. It restarted just fine, so this may have been a weird temporary condition. Should watch memory usage etc to check that...

I've added the symbols to the stack trace below per the secret recipe.

-- brion vibber (brion @ pobox.com)

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=134217728 read_buffer_size=4190208 max_used_connections=1145 max_connections=1200 threads_connected=17 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_connections = 1568054 K bytes of memory Hope that's ok; if not, decrease some variables in the equation.

thd=0xbb0fbff0 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... Cannot determine thread, fp=0xbf67f138, backtrace may not be correct. Stack range sanity check OK, backtrace follows:

0x8070610 handle_segfault + 420 0x8289628 pthread_sighandler + 184 0x8230bfd mem_area_free + 1717 0x822f5e5 mem_heap_block_free + 421 0x819bd60 trx_free + 3724 0x819c2ef trx_free_for_mysql + 739 0x80c96fc innobase_close_connection__FP3THD + 40 0x80c32fb ha_close_connection__FP3THD + 27 0x8069b9a _._3THD + 130 0x807023c end_thread__FP3THDb + 64 0x8079452 handle_one_connection + 938 0x8286ddc pthread_start_thread + 220 0x82bc5ba thread_start + 4

New value of fp=(nil) failed sanity check, terminating stack trace! Please read http://www.mysql.com/doc/en/Using_stack_trace.html and follow instructions on how to resolve the stack trace. Resolved stack trace is much more helpful in diagnosing the problem, so please do resolve it Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd->query at (nil) is invalid pointer thd->thread_id=29312209 The manual page at http://www.mysql.com/doc/en/Crashing.html contains information that should help you find out what is causing the crash.