求助,APACHE配置了虚拟主机后不稳定

我的服务器安装的是apache2.2,php5.在APACHE配置了两个虚拟主机后不稳定.表现的情况是,虚拟主机1无缘无故死去,而虚拟主机2却能正常访问.查看了日志发现有
[Thu Apr 10 15:06:44 2008] [notice] Child 5680: Waiting for 250 worker threads to exit.
[Thu Apr 10 15:06:44 2008] [notice] Child 5680: All worker threads have exited.
[Thu Apr 10 15:06:44 2008] [notice] Child 5680: Child process is exiting
[Thu Apr 10 15:34:04 2008] [notice] Parent: Received shutdown signal -- Shutting down the server.
[Thu Apr 10 15:34:04 2008] [notice] Child 1140: Exit event signaled. Child process is ending.
[Thu Apr 10 15:34:05 2008] [notice] Child 1140: Released the start mutex
[Thu Apr 10 15:34:06 2008] [notice] Child 1140: Waiting for 250 worker threads to exit.
[Thu Apr 10 15:34:06 2008] [notice] Child 1140: All worker threads have exited.
[Thu Apr 10 15:34:06 2008] [notice] Child 1140: Child process is exiting
[Thu Apr 10 15:34:06 2008] [notice] Parent: Child process exited successfully.
谁能帮我解释一下,本人感激不尽.

怎么没有人回答呢.
顶!

虚拟主机1的环境没有做好,或系统有问题.最好在干净的系统里做环境.

可以搜索一些相关的服务器配置参考下的.
或者可以咨询租服务器的服务商的