大家帮我看看这个error_log吧,救命啊

服务过一段时间就会挂掉,网站上不去,ssh也连不上,怪了
error_log看了,是如下情况,大家帮忙分析一下吧
[Sun Nov 22 04:02:10 2009] [notice] Digest: generating secret for digest authentication ...
[Sun Nov 22 04:02:10 2009] [notice] Digest: done
[Sun Nov 22 04:02:11 2009] [notice] mod_python: Creating 4 session mutexes based on 2000 max processes and 0 max threads.
[Sun Nov 22 04:02:11 2009] [notice] mod_python: using mutex_directory /tmp
[Sun Nov 22 04:02:12 2009] [notice] Apache/2.2.10 (Unix) DAV/2 PHP/5.2.9 mod_python/3.3.1 Python/2.5.2 mod_ssl/2.2.10 OpenSSL/0.9.8g mod_perl/2.0.4 Perl/v5.10.0 configured -- resuming normal operations
[Mon Nov 23 09:58:28 2009] [notice] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
[Mon Nov 23 09:58:28 2009] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Mon Nov 23 09:58:28 2009] [notice] Digest: generating secret for digest authentication ...
[Mon Nov 23 09:58:28 2009] [notice] Digest: done
[Mon Nov 23 09:58:31 2009] [notice] mod_python: Creating 4 session mutexes based on 2000 max processes and 0 max threads.
[Mon Nov 23 09:58:31 2009] [notice] mod_python: using mutex_directory /tmp
[Mon Nov 23 09:58:31 2009] [notice] Apache/2.2.10 (Unix) DAV/2 PHP/5.2.9 mod_python/3.3.1 Python/2.5.2 mod_ssl/2.2.10 OpenSSL/0.9.8g mod_perl/2.0.4 Perl/v5.10.0 configured -- resuming normal operations
[Mon Nov 23 10:24:51 2009] [notice] caught SIGTERM, shutting down
[Mon Nov 23 10:24:51 2009] [notice] SELinux policy enabled; httpd running as context unconfined_u:system_r:httpd_t:s0
[Mon Nov 23 10:24:51 2009] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Mon Nov 23 10:24:52 2009] [notice] Digest: generating secret for digest authentication ...
[Mon Nov 23 10:24:52 2009] [notice] Digest: done
[Mon Nov 23 10:24:52 2009] [notice] mod_python: Creating 4 session mutexes based on 2000 max processes and 0 max threads.
[Mon Nov 23 10:24:52 2009] [notice] mod_python: using mutex_directory /tmp
[Mon Nov 23 10:24:52 2009] [notice] Apache/2.2.10 (Unix) DAV/2 PHP/5.2.9 mod_python/3.3.1 Python/2.5.2 mod_ssl/2.2.10 OpenSSL/0.9.8g mod_perl/2.0.4 Perl/v5.10.0 configured -- resuming normal operations
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