Default Parameters for OraRacIndexFragTest

This test scans a pre-configured index sample for high and very high levels of fragmentation, and reports the count of fragmented indexes.

The default parameters associated with this test are as follows:

• The TEST PERIOD list box helps the user to decide how often this test needs to be executed.

• Specify the host for which the test is to be configured in the HOST text box.

• Specify the port on which the server is listening in the PORT text box.

• Specify the variable name of the oracle instance in the ORASID text box.

• 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’

• 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.

• Specify the password of the specified database user in the PASSWORD text box.

• Confirm the PASSWORD by retyping it here in the CONFIRM PASSWORD text box.

• Specify a comma-separated list of tables, the indexes of which need to be checked for fragmentation. Every table name should be specified in the following format: <DisplayName>:<schema_name>.<table_name>, where schema_name refers to the name of the table owner, and table_name refers to the name of the table. The DisplayName in your specification will appear as the descriptor of this test. For instance, to monitor the indexes of the alarm and history tables owned by user admin, your specification would be: AlarmMon1:admin.alarm,AlarmMon2:admin.history. To monitor all tables in a schema, the specification would be of the following format: <DisplayName>:<schema_name>.*. For example, to monitor all the tables in the admin schema, your specification would be: AlarmMon:admin.*.

  You can also configure the OBJECT NAME to indicate what percentage of records in a table are to be considered by this test for running index fragmentation checks. To achieve this, your OBJECT NAME specification should be of the following format: <DisplayName>:<schema_name>.<table_name>@<Percentage_of_records_in_the table>. For instance, say that you want to configure this test to monitor the indexes that correspond to 20% of the alarm table and 30% of the history table. The OBJECT NAME specification in this case will be: AlarmMon:admin.alarm@20,AlarmMon1:admin.history@30. It is recommended that you keep this ‘percentage value’ small, as higher values will make this test that much more resource-intensive.

  Note:

  Make sure that you configure the OBJECT NAME parameter with only table names and not view names. This is because, indexes are available for tables alone and not views.

• Specify the time period upto which a query has to wait to obtain the required result set from the database in the QUERYTIMEOUT text box. If the query is not successful or if the query waits for a time period exceeding the specified time limit, the test will automatically kill the query.

• If the value chosen for the ISPASSIVE flag 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 system 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 against DETAILED DIAGNOSIS. 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 bad and normal frequencies configured for the detailed diagnosis measures should not be 0.

• If multiple components of the same component type are awaiting configuration, then an APPLY TO OTHER COMPONENTS check box will appear in this page. Clicking on this check box will allow you to apply the configuration to all/selected components of that type.

• Once the above value is provided, click on the Update button to register the changes made.

When changing default configurations of tests, the values with "$" indicate variables that will be replaced by the eG system according to the specific server being managed - for instance, $hostName is the host/nickname of the target host, $port is the port number of the server being monitored. E.g., for a server xyz:80, $hostName will be changed automatically by the eG manager to "xyz" and $port will be changed to "80" when configuring a test.