Oracle RAC Jobs Test
This test monitors Oracle jobs and reports the number of jobs that have failed and those that are broken. The detailed diagnosis capability offered by this test enables administrators perform further diagnosis on failed/broken jobs, by additionally revealing the complete details of the failed and broken jobs.
This test is disabled by default. To enable the test, go to the enable / disable tests page using the menu sequence : Agents -> Tests -> Enable/Disable, pick the Oracle Cluster as the desired Component type, set Performance as the Test type, choose the test from the disabled tests list, and click on the >> button to move the test to the ENABLED TESTS list. Finally, click the Update button.
Target of the test : Oracle Cluster
Agent deploying the test : An internal agent
Outputs of the test : One set of results for the Oracle cluster
Configurable parameters for the test
- TEST PERIOD - How often should the test be executed
- Host – The host for which the test is to be configured
- Port - The port on which the server is listening
- orasid - The variable name of the oracle instance
service name - A ServiceName exists for the entire Oracle RAC system. When clients connect to an Oracle cluster using the ServiceName, then the cluster routes the request to any available database instance in the cluster. By default, the service name is set to none. In this case, the test connects to the cluster using the orasid and pulls out the metrics from that database instance which corresponds to that orasid. If a valid service name is specified instead, then, the test will connect to the cluster using that service name, and will be able to pull out metrics from any available database instance in the cluster.
To know the ServiceName of a cluster, execute the following query on any node in the target cluster:
select name, value from v$parameter where name =’service_names’
User – In order to monitor an Oracle RAC, a special database user account has to be User – In order to monitor an Oracle database server, a special database user account has to be created in every Oracle database instance that requires monitoring. A Click here hyperlink is available in the test configuration page, using which a new oracle database user can be created. Alternatively, you can manually create the special database user. When doing so, ensure that this user is vested with the select_catalog_role and create session privileges.
The sample script we recommend for user creation (in Oracle database server versions before 12c) for eG monitoring is:
create user oraeg identified by oraeg create role oratest;
grant create session to oratest;
grant select_catalog_role to oratest;
grant oratest to oraeg;
The sample script we recommend for user creation (in Oracle database server 12c) for eG monitoring is:
alter session set container=<Oracle_service_name>;
create user <user_name>identified by <user_password> container=current default tablespace <name_of_default_tablespace> temporary tablespace <name_of_temporary_tablespace>;
Grant create session to <user_name>;
Grant select_catalog_role to <user_name>;
The name of this user has to be specified here.
- Password – Password of the specified database user
- Confirm password – Confirm the password by retyping it here.
- ISPASSIVE – If the value chosen is yes, then the Oracle server under consideration is a passive server in an Oracle cluster. No alerts will be generated if the server is not running. Measures will be reported as "Not applicable" by the agent if the server is not up.
To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.
The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:
- The eG manager license should allow the detailed diagnosis capability
- Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.
Measurements made by the test
|Failed Oracle jobs:
Indicates the number of jobs that failed.
Ideally, the value of this measure should be 0. Any value greater than zero, is a cause of concern, as it indicates the existence of a failed job. To know which job(s) has failed, use the detailed diagnosis capability of this measure.
Typically, if a job fails, Oracle attempts to run the job again 16 times, at fixed time intervals. You are advised to investigate the reason for the failure and fix it, by the time Oracle completes its 16th attempt. This is because, if the 16th attempt too fails, Oracle flags the job as a ‘broken job’, which can then be executed only manually.
|Broken Oracle jobs:
||Indicates the number of jobs broken.
Ideally, the value of this measure should be 0. Any value greater than 0 is a problem, as it indicates the existence of one/more broken jobs. A job is considered broken, only if the 16th attempt made by Oracle to run the job fails. To know which jobs have broken, use the detailed diagnosis capability of this measure. Once the jobs are identified, you can proceed to manually run the broken jobs through the DBMS_JOB.RUN procedure after logging in as the owner of that job.