Shulou(Shulou.com)06/01 Report--

The Oracle Data Guard monitor process (DMON) is an Oracle background process that runs on every database instance that is managed by the broker. When you start the Oracle Data Guard broker, a DMON process is created.

DMON is an Oracle background process that starts with the startup of the database instance.

Whether you use Cloud Control or DGMGRL to manage a database, the DMON process is the server-side component that interacts with the local database and the DMON processes of the other databases to perform the requested function. The DMON process is also responsible for monitoring the health of the broker configuration and for ensuring that every database has a consistent description of the configuration.

The DMON process is a server-side component that monitors the health of the broker configuration and ensures that each database has a consistent configuration.

When we use the dgmgrl / client command, we want a picture in mind.

Next, let's do a test to see what happens when the DMON process exception is dropped by KILL.

[root@roidb01 ~] # ps-ef | grep dmon

Root 1651 1547 0 21:02 pts/2 00:00:00 grep-color=auto dmon

Oracle 27802 1 0 20:34? 00:00:00 ora_dmon_orcl

[root@roidb01] # kill-9 27802

[root@roidb01 ~] #

[root@roidb01 ~] # ps-ef | grep dmon

Root 1788 1547 0 21:03 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] # ps-ef | grep dmon

Root 1799 1547 0 21:03 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] # ps-ef | grep dmon

Root 1804 1547 0 21:03 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] # ps-ef | grep dmon

Root 1809 1547 0 21:03 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] # ps-ef | grep dmon

Root 1815 1547 0 21:03 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] # ps-ef | grep dmon

Root 1822 1547 0 21:03 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] # ps-ef | grep dmon

Root 1827 1547 0 21:03 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] # ps-ef | grep dmon

Root 1895 1547 0 21:03 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] # ps-ef | grep dmon

Oracle 1934 1 0 21:03? 00:00:00 ora_dmon_orcl

Root 2120 1547 0 21:04 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] # ps-ef | grep dmon

Oracle 1934 1 0 21:03? 00:00:00 ora_dmon_orcl

Root 2128 1547 0 21:04 pts/2 00:00:00 grep-color=auto dmon

[root@roidb01 ~] #

There are several types of processes in Oracle database. Some processes will be restarted by KILL, some will cause the host to restart, some will automatically pull up, and will not affect the application. DMON belongs to the latter.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.