Oracle Long Running Queries Test
This test tracks the currently executing queries on an Oracle database server and determines the number of queries that have been running for a long time.
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 Oracle Database as the Component type, Performance as the Test type, choose this 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.
This test will not report metrics for an Oracle 12c CDB server.
Target of the test : An Oracle server
Agent deploying the test : An internal agent
Outputs of the test : One set of results for every instance of an Oracle database.
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
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
This login information is required to query Oracle’s internal dynamic views, so as to fetch the current status / health of the various database components.
- 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.
- elapsed time - In the ELAPSED TIME text box, specify the duration (in seconds) for which a query should have executed for it to be regarded as a long running query. The default value is 10.
- displayquery fulltext - The detailed diagnosis of this test lists the queries that have been running for a long time. In the detailed diagnosis page by default, query strings that are very long are truncated to display the first 1000 characters of the query alone. This is why, the displayquery fulltext flag is set to No by default. To view the full query in the detailed diagnosis page, set this flag to Yes. Note that setting this flag to ‘Yes’ may increase the size of your eG database.
DETAILED DIAGNOSIS – 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
Long running queries
Indicates the number of queries currently executing on the database server that have been running for more time than the configured ELAPSED TIME.
The detailed diagnosis for this measure indicates the exact queries and which user is executing the queries. This information can be very useful in identifying queries that may be candidates for optimization.