（2）10g/11gR1: Assuming thedefault setting of "CSS misscount" is set to either 30 or 60seconds:
hangcheck_tick=1hangcheck_margin=10 hangcheck_reboot=1
--10g/11gR1: 假如"CSS misscount"的设置是30或者60秒，则hangcheck_tick=1hangcheck_margin=10 hangcheck_reboot=1
You must always ensure thatthe Cluster misscount setting is greater than the sum of the setting forhangcheck_tick + hangcheck_margin.
--注意：你必须设置集群的misscount值大于hangcheck_tick + hangcheck_margin之和。
When running OracleClusterware on Linux, hangcheck-timer should always be configured on each RACcluster node, as the functionality of this module is required to provide I/O Fencingto ensure no stray writes will occur from an evicted node in a RACcluster. To verify if the hangcheck-timer module is running on a nodeexecute as the root or oracle user:
--Linux 平台上的Clusterware，需要在每个节点上配置hangcheck-timer模块，可以用root用户执行如下命令来验证hangcheck-timer是否运行：
# /sbin/lsmod | grep hangcheck
hangcheck-timer 2672 0
If the hangcheck-timer moduleis loaded (running) you will see output similar to above. When hangcheck-timeris not loaded no output is generated, and the command prompt is returned to theuser.
In an Oracle Enterprise Linux,Red Hat 4/5, or SUSE 9/10 environment the hangcheck-timer module is loadedusing the modprobe command:
--使用如下命令来装载hangcheck-timer：
# modprobe hangcheck-timer hangcheck_tick=1 hangcheck_margin=10hangcheck_reboot=1
In order to ensure the moduleis loaded at boot time, you should also place the same command in the appropriatelocal command execution directory (e.g. /etc/rc.d/rc.local, or/etc/init.d/boot.local). In earlier releases, hangcheck-timer was loadedusing insmod in place of modprobe. Consult your release specific documentationto determine which initialization method is required.
--为了确保在系统启动时就装载了hangcheck-timer模块，我们可以将命令添加到/etc/rc.d/rc.local,or /etc/init.d/boot.local中。
Hangcheck-timer will providemessage logging to the system messages log when a failure is detected, and anode restart is initiated by the module:
--当hangcheck-timer检测到系统hang时，会在系统log里记录日志并重启系统。
(1) When Hangcheck-timer reboots itmay leave "Hangcheck: hangcheck is restarting the machine" message in/var/log/messages。
-- hangcheck-timer的启动信息都会记录在系统日志里“ /var/log/messages”，重启时会记录"Hangcheck:hangcheck is restarting the machine"信息到/var/log/messages
(2) If you see the followingmessage in /var/log/messages: "Hangcheck: hangcheck value pastmargin!" this means a reboot was required but was not performed, becausehangcheck_reboot was not set to 1. If this message is seen, you mustreload the hangcheck module as described earlier in this note, with thehangcheck_reboot value set to 1.
--如果你看到/var/log/messages中有"Hangcheck:hangcheck value past margin!"消息，表示系统需要重启但是没有重启，因为hangcheck-reboot参数没有设置为1。
注：
Bug:6125546 which can preventhangcheck-timer from rebooting in RHEL4 (fixed in 2.6.9.56 or RHEL4.6)