Oracle DataFile Growth Test
Periodic monitoring of the usage of the database is essential to ensure that the database is always adequately sized to handle current and future loads. This test monitors the usage of the datafiles that underlie a managed Oracle database instance, and indicates if any of the datafiles require resizing.
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.
Note:
This test is applicable for Oracle Database with Multi-tenancy i.e., CDB(Container Database) and PDB (Pluggable Database) configuration.
Target of the test : An Oracle server
Agent deploying the test : An internal agent
Outputs of the test : One set of results for every datafile monitored.
| Parameter | Description |
|---|---|
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Test period |
How often should the test be executed |
|
Host |
The host for which the test is to be configured. |
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Port |
The port on which the server is listening. |
|
Username |
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 |
Specify the password of the specified database user. |
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Confirm Password |
Confirm the Password by retyping it here. |
|
Alternate View |
In large environments, where the volume of transactions to the Oracle database server is generally very high, this test may take time to execute and retrieve the desired results. To ensure that the test is faster and is resource-efficient, administrators of such environments can create an alternate ‘view’ on the target Oracle database server, and grant select privileges to the view to the special database User mentioned above. Once the view is created, the test should be configured to use the alternate view for metrics collection; to achieve this, specify the name of the view in the Alternate View text box. By default, this text box is set to none, which implies that the alternate view is not used by default. This alternate ‘view’ should be created with the following structure: CREATE OR REPLACE VIEW <VIEW_NAME> ( TABLESPACE_NAME, FILE_ID, BLOCK_ID, BYTES, BLOCKS, RELATIVE_FNO ) AS select /*+ use_hash (tsfi, fet2) */ tsfi.tablespace_name, tsfi.file_id, fet2.block_id, tsfi.blocksize * fet2.blocks, fet2.blocks, tsfi.relfile# from (select /*+ use_hash (ts, fi) */ ts.name tablespace_name, fi.file# file_id, ts.BLOCKSIZE, fi.relfile#, ts.ts# from sys.ts$ ts, sys.file$ fi where ts.ts# = fi.ts# and ts.online$ in (1,4)) Tsfi, (select f.block# block_id, f.length blocks, f.file# file_id, f.ts# from sys.fet$ f union all select f.ktfbfebno block_id, f.ktfbfeblks blocks, f.ktfbfefno, ktfbfetsn from sys.x$ktfbfe f) Fet2 where fet2.file_id = tsfi.relfile# and fet2.ts# = tsfi.ts# ; |
|
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. |
|
SSL |
By default, this flag is set to No, as the target Oracle database is not SSL-enabled by default. If the target database is SSL-enabled, then set this flag to Yes. |
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SSL Cipher |
This parameter is applicable only if the target Oracle database is SSL-enabled, if not, set this parameter to none. A cipher suite is a set of cryptographic algorithms that are used before a client application and server exchange information over an SSL/TLS connection. It consist of sets of instructions on how to secure a network through SSL (Secure Sockets Layer) or TLS (Transport Layer Security). In this text box, provide a comma-seperated list of cipher suites that are allowed for SSL/TLS connection to the target database. By default, this parameter is set to none. |
|
Truststore File |
This parameter is applicable only if the target Oracle database is SSL-enabled, if not, set this parameter to none. TrustStore is used to store certificates from Certified Authorities (CA) that verify and authenticate the certificate presented by the server in an SSL connection. Therefore, the eG agent should have access to the truststore where the certificates are stored to authenticate and connect with the target database and collect metrics. For this, first import the certificates into the following default location <eG_INSTALL_DIR>/lib/security/mytruststore.jks. To know how to import the certificate into the truststore, refer toPre-requisites for monitoring Oracle Cluster. Then, provide the truststore file name in this text box. For example: mytruststore.jks. By default, none is specified against this text box. |
|
Truststore Type |
This parameter is applicable only if the target Oracle database is SSL-enabled, if not, set this parameter to none.Specify the type of truststore that contains the certificates for server authentication in this text box. For eg.,JKS. By default, this parameter is set to the value none. |
|
Truststore Password |
This parameter is applicable only if the target Oracle database is SSL-enabled, if not, set this parameter to none. If a Truststore File name is provided, then, in this text box, provide the password that is used to obtain the associated certificate details from the Truststore File. By default, this parameter is set to none. |
|
Keystore File |
This parameter is applicable only if the target Oracle database is SSL-enabled, if not, set this parameter to none. Keystore contains the private keys for the certificates that the client can provide to the server upon request. eG agent requires access to the keystore where client certificate is stored to send that to the server so that the server validates the certificate against the one contained in its trustore. For this purpose, first create the client certificate in the following default location /opt/egurkha/jre/lib/security/egmqsslstore.jks. |
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Keystore Password |
This parameter is applicable only if the target Oracle database is SSL-enabled, if not, set this parameter to none. If a Keystore File name or file path is provided, then, in this text box, provide the password that is used to obtain the associated certificate details from the Keystore File. |
|
Confirm Password |
Confirm the Password for Keystore by retyping it here. |
| Measurement | Description | Measurement Unit | Interpretation |
|---|---|---|---|
|
Datafile size: |
Indicates the current size of this datafile. |
MB |
|
|
Used space in datafile: |
Indicates the amount of database space that has been currently utilized by this datafile. |
MB |
|
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Free space in datafile: |
Indicates the amount of free space currently available for this datafile. |
MB |
|
|
Space usage: |
Indicates the percentage of database space that has been utilized by this datafile. |
Percent |
Ideally, this value should be low. A value close to 100% is a cause for concern. |
|
Space free: |
Indicates the percentage of free space for this datafile. |
Percent |
Ideally, this value should be high. A sudden/consistent decrease in the value of this measure could indicate excessive utilization of the database caused by a sporadic/steady increase in database activity. Very low free space for a datafile could significantly deteriorate database performance. Under such circumstances therefore, you might want to resize that particular datafile or reorganize all the datafiles that are present in the managed database instance. |