今天发现 P570 crontab 不运行，

查看/var/adm/cron/log 文件,里面报错信息如下：

# tail log
! 0481-095 The cron job is being rescheduled.
Fri Mar 2 09:22:00 BEIST 2007
! cron: 0481-087 The c queue maximum run limit has been reached.
Fri Mar 2 09:22:00 BEIST 2007
! 0481-095 The cron job is being rescheduled.
Fri Mar 2 09:22:00 BEIST 2007
! cron: 0481-087 The c queue maximum run limit has been reached.
Fri Mar 2 09:22:00 BEIST 2007
! 0481-095 The cron job is being rescheduled.
Fri Mar 2 09:22:00 BEIST 2007
! cron: 0481-087 The c queue maximum run limit has been reached.
Fri Mar 2 09:22:00 BEIST 2007
! 0481-095 The cron job is being rescheduled.
Fri Mar 2 09:22:00 BEIST 2007
! cron: 0481-087 The c queue maximum run limit has been reached.
Fri Mar 2 09:22:00 BEIST 2007
! 0481-095 The cron job is being rescheduled.
Fri Mar 2 09:22:00 BEIST 2007
! cron: 0481-087 The c queue maximum run limit has been reached.
Fri Mar 2 09:22:00 BEIST 2007
! 0481-095 The cron job is being rescheduled.
Fri Mar 2 09:22:00 BEIST 2007

问题原因：

crontab 没有定时执行是因为“! cron: 0481-087 The c queue maximum run limit has been reached.”。
修改/var/adm/cron/queuedefs 文件。在里面加上这样一句:"c.200j20n60w"，然后kill PID，其中PID为cron进程号,新的cron设置就会生效。Maximum number of jobs in the queue by default was 50. The errorc messages 0481-087, 0481-095 usually appears when this max. number
is reached. So you can increase the maximum number of jobs in /var/adm/cron/queuedefs , vi the queuedefs file and change
the b to c and the 50 to 200. by including this entry"c.200j20n60w" in the file. After making the changes to the file, killcron and it will respawn again with the new settings.

解决方法：

#
#
# here is an example of a low prority (nice 20), 50 entry batch queue
# b.50j20n60w
c.1000j2n60w

在/var/adm/cron/queuedefs/queuedefs加以C队列为1000就可以了。

ps -ef|grep cron

kill -9 con服务的进程号

cron的服务会自动重启，问题解决。