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Ϊ��ֹͣ��Apache ��е�httpd��̷��źš��ַ��źŵķ��һ�ַ��ֱ��ʹ��UNIX��kill��еĽ��̷��źš��Ҳ��ע�⵽��ϵͳ��źܶ�httpd��̡��㲻Ӧ��ֱ�Ӷ��е��κ�һ��źţ��ֻҪ��Ѿ��PidFile�м��PID�ĸ��̷��źš�Ҳ��˵��㲻�ضԸ��κν��̷��źš��򸸽��̷��źţ�TERM��HUP��USR1 ��ǹ�һ��ٽ��ϸ��˵��

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kill -TERM `cat /usr/local/apache2/logs/httpd.pid`

�ڶ��ַ��ʹ��潫Ҫ��httpd��ƿ�ִ��ļ�� -k ��ѡ�stop��restart��graceful��graceful-stop ��Ƽ��ʹ��apachectl��ƽű��httpd��ƿ�ִ��ļ��Щѡ�

��httpd��źź��ȡ��Ľ��й��̣�

tail -f /usr/local/apache2/logs/error_log

��޸��Щʾ��Ӧ��ServerRoot��PidFile��á�

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�źţ�TERM: apachectl -k stop

��TERM��stop�źŵ��̿��ʹ��ɱ��ӽ��̡��⽫��һЩʱ��ɱ��ӽ��̡�Ȼ�󸸽��Լ�Ҳ�˳��н��е��󽫱�ǿ��ֹ��Ҳ��ٽ��

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�źţ�USR1: apachectl -k graceful

USR1��graceful�ź�ʹ�ø�����ӽ��ڵ��˳�(��û�н��з��񣬽��˳�)����¶����ļ��´��־�ļ��ÿ��һ��ӽ��µ��ļ��һ��µ��ӽ��̲��̿�ʼ�ŷ��µ��

��ܹ�ȷ��MPM��̿��ָ��Ҳ��ȷ��ʵ��Ľ��̺��߳��Ӧ�ͻ��˵��StartServers�ģ��һ��Ժ�û��´��StartServers��ӽ��̣��򴴽��㹻��ӽ��̸��ˣ��˱��ܹ�ά�ַ��и��ӽ��⣬Ҳȷ��StartServers��Ը��

ʹ��mod_status��û��ע�⵽��USR1�źŷ��󣬷��ͳ��Ϣû����㡣��뱻д�ɼ��ܽ��޷��ŷ��ʱ�併��(��Щ��󽫱��ϵͳ�ŵ��ʹ��ǲ��ᶪʧ)��Ĳ��Ż��Ϊ��һ�㣬��ӽ��̵Ĺ��У��scoreboard�ϱ��ӽ��̵�״̬��

mod_status��Ὣ��Щ��ǰ��Ѿ��ʼ��û�н��ŷ��ӽ��һ��"G"��־��

Ŀǰ��־��ű��޷�ʹ��USR1��ȷ��д��Ԥ��־��ӽ��̶��ѽ��ǽ��ڷ��USR1�źź�ȴ�һ��ʵ��ʱ�䣬Ȼ��ٶԾɵ��־��˵��һ��խ��û��˵��󲿷ֵĵ��10��֮��ɣ��ô��Ӧ��ڴ��ɵ��־ǰ�ȴ�15��ӡ�

��Apache��ʱ��ļ��ô��̽��Ǳ��˳��£��ڴ��е��ӽ��̴��ڵ��ά��Ĵ��(��Щ��Ҫ��ڴ��ǵ��"��˳�"��ӽ��)��Ҫ��⽫��һЩ��⣺��ܰ󶨵��ļ��˿ڡ��ִ��֮ǰ�� -t ��в��ļ��﷨��ȷ��(�μ�httpd)��Ȼ��ܱ�֤��һ��ȷ��Ϊ�˴��﷨��ļ��һ��root�û��httpd��û�д��ȥ��׽��ֺ��־�ļ��̶��û��rootȨ�޶�ʧ��(��Ϊ��е�httpd�Ѿ��Щ�˿�)��Ϊ��ԭ��ô�Ϳ��һ��ļ��Ĵ��Ӧ��ڽ��֮ǰ��

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�źţ�HUP: apachectl -k restart

�򸸽��̷��HUP��restart�źŻ�ʹ��յ�TERM�ź�һ��ɱ��е��ӽ��̣��֮ͬ��ڸ��̱��˳��¶��ļ��´��־�ļ��Ȼ��һϵ��µ��ӽ��

ʹ��mod_status��û��ע�⵽��HUP�źŷ��󣬷��ͳ��Ϣ�ᱻ��㡣

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�źţ�WINCH: apachectl -k graceful-stop

WINCH��graceful-stop�ź�ʹ�ø�����ӽ��ڵ��˳�(��û�н��з��񣬽��˳�)��Ȼ�󸸽��ɾ��PidFile��ֹͣ��ж˿��ϵļ��Ȼ��в��ڴ��ӽ��̣�һ��ӽ��˳��߳��GracefulShutdownTimeoutָ��涨��ʱ�䣬��̽��˳��ڳ�ʱ��£��ӽ��̶��յ�TERM�źŲ��ǿ��˳��

��"��"״̬�£�TERM�źŽ��ֹ��̺��ӽ��̡��PidFile�Ѿ��ɾ��㽫�޷�ʹ��apachectl��httpd��͸��źš�

graceful-stop��ͬʱ��ж��ͬ��õ�httpdʵ��ڶ�Apache��ƽ��ʱ��һ��ǳ��õ��ԡ��ĳЩ��õ��ͬ��ܻᵼ��;��

��ע��ȷ��Lockfile��ScriptSock֮��Ĵ��ļ��PID ��ܹ��ȫ�Ĺ��档Ȼ��һ��ָ���ģ��־�CGIʹ��κδ��״̬�ļ��ע��ȷ��httpd��ʵ��֮�䲻��ļ��

�㻹��ֹǱ�ڵľ��ʹ��rotatelogs��Ĺܵ��־��еĶ��rotatelogsʵ��ͼͬʱ��ͬһ��־�ļ��ܻᵼ�»��ƻ��Է��־�ļ��

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��Apache 1.2b9 ֮ǰ��кܶ��źŵ�����ھ��һ��ǣ�һ��ʱ��е��⣬��һЩ��ڲ��ʵ��ʱ��Բ�ǡ��˳��㲻��ķ�Ӧ��ͬ��ǡ��ʱ�䷢��򲻻��쳣��ƾ��Щӵ��"��ȷ"��õ��ϵ�ṹ��Ǿ��ǵĳ��֡��ֵ��ע��ǣ��Ȼ��һЩ��ϵ�ṹ�С�

ʹ��̵�ScoreBoardFile��ScoreBoard��Ǳ��Σ�ա��⽫��"bind: Address already in use"(HUP֮��)��"long lost child came home!"(USR1֮��)ʱ��ǰ��һ��󣬶��ʹ��ʧScoreBoard��һ��¼��ǽ��ʹ��ż��ʹ��Ӳ��Щ��ѽ��˵��Ǵ��ṹ��ҪScoreBoard�ļ��Ҫ��Ľṹ��Բο�ScoreBoardFile�ĵ��

��ÿ��ӽ��һ��HTTP�ĳ��(KeepAlive)��漰��ڶ��ʱ��еĽṹ��ٴ��ھ��״̬��⡣��ڶ�ȡ��û�ж�ȡ�κ��ͷ֮��˳��޸��1.2��˵��̫��ˡ��Ϊ��ӵĿͻ��Ѿ��ǵ��ʱ�ͷ��ʱ��Ƶ��˵��ⲻ��һ��̫��⡣��ʵ��ƺ�Ҳû��κ�Ӱ�죺��һ��԰��з��һ��֮�ڱ��20�Σ��ͻ��ȴ�ɹ��վ��û��κ��ͼƬ��ĵ��

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