041009 11:18:20  mysqld restarted
/usr/local/mysql/libexec/mysqld: ready for connections
mysqld got signal 10;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked agaist 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=8388600
record_buffer=131072
sort_buffer=2097144
max_used_connections=54
max_connections=100
threads_connected=19
It is possible that mysqld could use up to
key_buffer_size + (record_buffer + sort_buffer)*max_connections = 225791 K
bytes of memory
Hope that's ok, if not, decrease some variables in the equation


问题如上，什么原因？如何解决？
谢了！