mysql 데몬이 다운이 됩니다...ㅠ,,ㅠ

[mysql 최적화]

현재 웹서버 6대 / 디비서버 1대 로 로드발란싱을 하면서 서비스를 운영하고 있습니다.
많은 접속자로 디비가 처리를 제대로 하지 못하면서 데몬이 자주 다운이 됩니다.
나름대로 튜닝을 하고 있지만 죄대로 되지를 않습니다.
그래서 도움을 받고자 이렇게 글을 올립니다.
아래의 내용을 보시고 도움을 주셨으면 합니다.
그리구 디비서버를 2-3대로 운영할수 있는 방안이 있는지... 궁금합니다.
감사합니다.
------------------------------------------------------------------------------------------------
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=1073741824
read_buffer_size=16773120
max_used_connections=922
max_connections=1500
threads_connected=750
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_connections = 2287748 K
bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

You seem to be running 32-bit Linux and have 750 concurrent connections.
If you have not changed STACK_SIZE in LinuxThreads and built the binary
yourself, LinuxThreads is quite likely to steal a part of the global heap for
the thread stack. Please read http://www.mysql.com/doc/L/i/Linux.html

thd=0x87097988
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=0x8c7fe988, backtrace may not be correct.
Stack range sanity check OK, backtrace follows:
0x808b47a
0x82c7680
0x80e5468
0x80b93f9
0x80b3285
0x80b1ebd
0x8097ea0
0x809c30d
0x8096fc9
0x8096b60
0x80964c1
0x82c2ecd
0x82f7967
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 0x90ffcd8 = select code from goods where (vflag='y' and maker='a') and (gtype=131 or gtype2=131 or gtype3=131 or gtype4=131) and (gtype<710 or gtype>719) order by ordnum DESC
thd->thread_id=1052422
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.
------------------------------------------------------------------------------------------------

[재윤아빠]

/etc/my.cnf 파일의 내용을 첨부하시는게
답변을 받기에 빠를듯 보이네요.

제 경험상으로도 저 got signal 11은 지겨워서.. ㅡ.ㅡ;;;;;

또한 binlog, SlowQueryLog를 살펴보세요.

그리고 가장 중요한거.. mysql이 실행권한 유저가 뭐냐에 따라 저렇게 에러나면서 바로바로 사망하던 데몬이 정상적으로 돌아가네요... ㅡ.ㅡ;;;;

[손님]

my.cnf 첨부 해드립니다.
서버사양은 아래의 정보를 참조해 드립니다.
----------------------------------------------------------------------
cpu: Intel(R) Xeon(TM) MP CPU 2.50GHz * 4
mem:4gb
swap: 3gb
----------------------------------------------------------------------
[mysqld]
port = 3306
socket = /tmp/mysql.sock
datadir = /usr/local/mysql/data
skip-locking
set-variable = key_buffer=1024M
set-variable = max_allowed_packet=1M
set-variable = table_cache=4096
set-variable = sort_buffer=64M
set-variable = record_buffer=16M
set-variable = myisam_sort_buffer_size=64M
set-variable = thread_cache=24
set-variable = max_connections=5000
set-variable = wait_timeout=30
# Try number of CPU's*2 for thread_concurrency
set-variable = thread_concurrency=24
set-variable = max_connect_errors=5000
----------------------------------------------------------------------

[truefeel]