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�� н�� ý��ۿ�� ġ�� ߴ��ϰ� ��ϴ� �� ִ�. �� NT, 2000, XP ��ڴ� ��񽺷� ��ġ ��ϱ��, �� 9x�� ME ��ڴ� �ݼ� ��α׷�� ġ ��ϱ�� ÷�� ġ ��۹�� ִ�.

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��ġ�� ߴ��ϰ� ��Ϸ�� ϰ� �ִ� httpd ��μ�� ñ׳�� Ѵ�. �ñ׳�� ΰ��. �ϳ�� н� kill ��ɾ ��Ͽ� ��μ�� ñ׳�� ̴�. �ý��ۿ� �� httpd�� , PidFile�� pid�� ϵ� �θ�ܿ� �ٸ� ��μ�� ñ׳�(signal)�� ȵȴ�. ��, �θ��̿ܿ� �ٸ� ��μ�� ñ׳�� ʿ䰡 ��ٴ� ��̴�. �θ𿡰� �� ִ� �ñ׳�� , �� TERM, HUP, USR1�̴�.

�� θ𿡰� �ñ׳�� :

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

httpd ��μ�� ñ׳�� ٸ� �� ɼ� -k�� ϴ� ��̴�. �Ʒ�� stop, restart, graceful�� httpd �� ƱԸ�Ʈ��̴�. �׷�� ƱԸ�Ʈ�� httpd�� ϴ�, apache2ctl ��ũ��Ʈ�� ϱ� ��Ѵ�.

httpd�� ñ׳�� , �� ɾ�� Ȳ�� ִ�:

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

�� ServerRoot�� PidFile �� ˸°� ��϶�.

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�ñ׳�: TERM: apache2ctl -k stop

TERM�̳� stop �ñ׳�� θ𿡰� �� ڽ�� δ�. �ڽ�� ̴µ�� ʰ� �ɸ� �� ִ�. �׷�� θ� ��Ѵ�. ó�� û�� ߴܵǰ�, �� ̻� ��û�� ʴ´�.

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�ñ׳�: USR1: apache2ctl -k graceful

USR1�̳� graceful �ñ׳�� θ𿡰� �� θ� ��μ�� ڽĵ鿡�� û�� ó�� ϶�� (Ȥ�� ƹ��͵� ó�� ʴٸ� �� ϶��) ��Ѵ�. �θ�� ٽ��а� �α��ϵ� �ٽ� ��. �ڽ�� θ�� ڽĴ�� ο� �� ���� ڽ�� Ͽ� �� û�� ó��ϰ� �Ѵ�.

�� (graceful restart)�� USR1�� ÷�� (WINCH�� ) �ٸ� �ñ׳�� ִ�. apache2ctl graceful�� ÷�� ˸�� ñ׳�� .

�� ׻� MPM�� μ�� þ� �� Ͽ�, ��۵�� Ŭ��̾�Ʈ�� ϴ� ��μ�� 尡 �� ϵ�� Ǿ��. �Դٰ� StartServers��, �� ּ�� StartServers��ŭ ��ο� �ڽ�� ȸ�� ڽ�� StartServers �� ǵ�� . ��, ��α׷�� Ͽ� �˸�� ڽ�� ϸ�, StartServers �Ķ��ͷ� �� 븦 ��Ѵ�.

mod_status ��ڴ� USR1�� 谡 0�� �� �� ̴�. �� ο� ��û�� (�ü�� ̵�� ť�� Ƽ� � ��쿡�� Ҿ�� ʴ´�) ó�� ϴ� �ð�� ּ�ȭ�ϰ� �� Ʃ�� Ķ��͸� ��ϵ�� . �̸� �� 밣 �� ڽ�� ϴ� scoreboard�� Ѵ�.

status �� Ͽ� �� û�� ó��ϰ� �ִ� �ڽ�� G�� ˷��ش�.

��δ� USR1�� ϴ� �α׼�ȯ ��ũ��Ʈ�� ڽ�� α��ۼ�� ƴ�� ִ� �� . �츮�� USR1 �ñ׳�� ð�� α׸� �ٷ絵�� Ѵ�. �� 뿪�� κ�� ġ�µ� 10�� Ȱɸ��ٸ�, �� α׸� �ٷ�� 15�� ٸ��.

��Ͽ� �� ִٸ� ��۽� �θ�� ʰ� �� Ѵ�. ��, �� Ҷ� �ڽ�� ǵ�� д�. (�ڽĵ�� ڽ�� û�� ó��ϰ� "��ݰ� ��Ѵ�".) �̴� �� Ҷ� �� ȴ�. �� ڽ�� ٸ� ��Ʈ�� Ѵ�. �� -t �� ɼ�(httpd ��)�� ˻�� ִ�. �׷�� ̷� �˻絵 �� ùٷ� �� Ѵ�. �� ƴ� �ǹ̸� �˻��Ϸ�� root�� ƴ� ��ڷ� httpd�� غ� �� ִ�. root�� ƴϱ⶧�� (�ƴϸ� �� Ʈ�� ϴ� httpd�� Ǳ⶧��) �� ٸ� ��ϰ� �α�� õ��ϴ� �� ̴�. �ٸ� �� Ѵٸ� �Ƹ�� Ͽ� �� ̴�. �� ϱ�� ľ��Ѵ�.

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�ñ׳�: HUP: apache2ctl -k restart

HUP�̳� restart �ñ׳�� θ𿡰� �� TERM�� ڽ�� θ�� ʴ´�. �θ�� ٽ��а� �α�� ٽ� ��. �׸�� ο� �ڽĵ�� 񽺸� ��Ѵ�.

mod_status ��ڴ� HUP�� 谡 0�� ִ�.

��Ͽ� �� ִٸ� �� ص� �θ�� ʰ� �� ̴�. �̸� ��ϴ� �� ϶�.

�η�: �ñ׳ΰ� ��̽� ��

Apache 1.2b9 �� ۰� �� ñ׳ο� �� ��̽� ��(race condition)�� ־��. (��̽� �� ڸ�, � �� ߸��ȶ� �Ͼ�� Ѵ�� ʴ� �ð�� ΰ�� .) "�ùٸ�" �� ִ� ��Ű��Ŀ�� 츮�� ̷� �� ִ�� ذ��ߴ�. �׷��  ��Ű��Ŀ�� ̽� �� ϶�.

ScoreBoardFile�� ũ�� ϴ� ��Ű��Ĵ� scoreboard�� Ʈ�� ɼ�� ִ�. �׷�� (HUP��) "bind: Address already in use" Ȥ�� (USR1 ��) "long lost child came home!"�� ߻�� ִ�. ��ڴ� �ɰ�� ̰�, ��ڴ� �� scoreboard slot�� Ұ� ��. �׷�� ̰� �� ϱ� ��õ�Ѵ�. �� ذ��ϱ� �ſ� ��. �׷�� κ�� Ű��Ĵ� scoreboard�� ʴ´�. �� ϴ� ��Ű��Ķ�� ScoreBoardFile �� ϶�.

�� Ű��Ŀ�� ӵǴ� HTTP �� (KeepAlive)�� ι�° �� û�� ó��ϴ� �ڽĿ� �ణ�� ̽� �� ִ�. �ڽ�� û�� û �� б�� ִ�. �� ʹ� �ʰ� �߰��Ͽ� 1.2 �� Ŀ�� Ǿ��. �׷�� Ʈ�� ̳� �� ð��Ѷ�� KeepAlive Ŭ��̾�Ʈ�� ̷� ��츦 ��ؾ��ϱ� �� ̷л� �� ȵȴ�. �� ˻��ϱ�� ʿ� 20�� ϴ� �� Ŭ��̾�Ʈ�� ׸��̳� �� Ʈ�� о��̱� �� ʴ´ٸ� �� ȵȴ�.

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