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Monitoring RAC with Grid Control

Oracle RAC Cluster Tips by Burleson Consulting

This is an excerpt from the bestselling book Oracle Grid & Real Application Clusters.  To get immediate access to the code depot of working RAC scripts, buy it directly from the publisher and save more than 30%.

To use the Grid Control to monitor RAC, all that is needed is the login user and password established when the Grid Control was installed and a valid web browser such as Internet Explorer, Netscape or Mozilla. The address of the Grid Control portal is entered, and the main Grid Control login screen is invoked as shown in Figure 9.3.

Figure 9.3: Grid Control Login aka Enterprise Manager

The standard address for invoking Grid Control is:


The port 7777 is the standard port although there are also secured versions of the screen which use https and port 7779.

Once successfully logged on to Grid Control, the top level Grid control screen is displayed. This top level screen is shown in Figure 9.4.

Figure 9.4: Grid Control (Top level Enterprise Manager)

From the top level screen, the mouse can be used to click on various controls, specifically under Targets, to get to the cluster database screen. The cluster database screen will be used whenever a target is selected that is part of a RAC installation. The RAC cluster screen shows all instances, their status and any alerts that pertain to the currently selected cluster database. This screen is shown in Figure 9.5.

Figure 9.5: Grid Cluster Monitor Screen

This screen contains a great deal of information. Each underlined item provides drill down capability to more and more detailed information. Notice there are the Home, Performance and Targets subscreens available from this top level screen along with the usual Alert History, Blackouts which is the time when monitoring is specifically turned off, and Deployments screens. The Performance screen gives cluster specific performance metrics. The Performance Screen is shown in Figure 9.6.

Figure 9.6: Cluster Database Top Level Performance Screen

From the Cluster Performance Screen, there are four additional performance related screens for drilling down:

* Cluster Cache Coherency

* Top Sessions

* Database Locks

* Top Consumers

The Top Sessions, Database Locks and Top Consumers pages are the standard Oracle Grid Control or Enterprise Manager performance screens.  The only one specifically dealing with RAC is the Cluster Cache Coherency page, which is shown in Figure 9.7.

Figure 9.7: Cluster Database Cache Coherency Screen

The Cache Coherency Screen provides detailed information about the performance of the RAC environment. This data is updated in real time with a normal update frequency of every 15 seconds. This screen provides drill downs into the standard Top Sessions and Database Locks screens.

Creating RAC Related Jobs Using Grid Control

Another valuable capability of the Grid Control system is the ability to specify jobs to be run against databases, servers or groups of related resources known as services. Figure 9.8 shows an example Job Specification screen from Grid Control.

Figure 9.8: Grid Control Job Screen

This screen specifies the desire to create a SQL Script job.  The types of jobs that can be created include shell script, OS command, Backup and Recovery and several others. The job is created using the Job Specification screens, the first of which, Target Selection, is shown in Figure 9.9.

Figure 9.9: Target Selection Screen

Once targets are selected, the Create Script Job Screen to actually specify the SQL Script for this example is next. Figure 9.10 shows the Create Job Script screen.

Figure 9.10: Create SQL Script Job Page

Once SQL is entered, the Scheduling screen, shown in Figure 9.11, is next.

Figure 9.11: Job Scheduling screen.

Once the execution schedule has been established, the results of the creation of the job can be observed by getting a successful configuration message in the Job Main Screen as shown in Figure 9.12.

Figure 9.12: Successful Job Creation Message.

Once the job has been successfully created, it can be monitored for successful execution using the Job Run screen shown in Figure 9.12.

Figure 9.13: Job Run Screen


This is an excerpt from the bestselling book Oracle Grid & Real Application Clusters, Rampant TechPress, by Mike Ault and Madhu Tumma.

You can buy it direct from the publisher for 30%-off and get instant access to the code depot of Oracle tuning scripts.


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