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Set Up Oracle Performance Metrics Script on Linux

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This page has instructions for setting up the performance metrics script on Linux for the Oracle app.

The script was developed and tested on:

  • Linux Server 8.4, Python (3.7.10), Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production - Version 19.3.0.0.0

About the Performance Metric Script

The Sumo app for Oracle uses a Python script to query database tables to collect Oracle server performance metrics.

The script connects the database using a database user account, runs a set of example SQL queries, and prints the query results in JSON format to the console. The account credentials and SQL queries are specified in the script configuration file, oracle-perf-monitor.cfg.

The SQL queries in the “[queries]”  section of the configuration file are provided as examples. You can add, modify, and remove queries, as desired. We recommend having the queries you plan to use reviewed by your DBA.

The database user that you use to run the SQL queries should have permission to access query-specific databases, tables, and views. The table below shows the SQL commands to grant the required permissions for each query.

Query 

SQL Command to Grant Permissions

For Queries 1 through 3

SQL> grant select on sys.v_$tablespace to <username>;

SQL> grant select on sys.dba_free_space to <username>;

SQL> grant select on sys.v_$datafile to <username>;

SQL> grant select on v_$sysstat to <username>;

For Query 4

SQL> grant select on sys.v_$session to <username>;

SQL> grant select on sys.v_$process to <username>;

For Queries 5 and 6

SQL> grant select on sys.v_$session_wait to <username>;

SQL> grant select on sys.dba_jobs to <username>;

Prerequisite

Check the version of Linux currently running on your machine to ensure compatibility with the script. 

$ lsb_release -a

LSB Version: :core-4.1-amd64:core-4.1-noarch

Distributor ID: OracleServer

Description: Oracle Linux Server release 8.4

Release: 8.4

Codename: n/a

If you get the error lsb_release: command not found , use below command to install lsb core and then re-run above command

sudo yum update && sudo yum install redhat-lsb-core

In this step, you install Python 3.7.10 for Linux.

  1. Install Python using the following command.
    yum install python3 -y
    ln -s /usr/bin/python3 /usr/bin/python

  2. To check the Python version:
    python3 --version
    Python 3.7.10

  3. In this step, you install pip if it’s not already installed.

    1. To determine whether pip is installed, run this command:
      $ pip3 -V
      If pip is not installed, you’ll see this message:
      The program 'pip' is currently not installed.

    2. To install pip, run this command
      yum install python3-pip -y

    3. To verify the installation, run this command:
      $ pip3 -V
      You should see message like this:
      pip 20.2.2 from /usr/lib/python3.7/site-packages/pip (python 3.7).

  1.  Install Oracle Instant Client packages
    $ dnf install oracle-instantclient-release-el8 -y
    $ dnf install oracle-instantclient-basic
    $ oracle-instantclient-devel oracle-instantclient-jdbc
    $ oracle-instantclient-odbc oracle-instantclient-sqlplus oracle-instantclient-tools -y

  2. Install the libaio and libaio-dev packages if they are not already installed. Typically, in standard Oracle Linux Server, the libaio and libaio-dev are not pre-installed. These packages are required to start the Oracle Instant Client.
    $ dnf install -y libaio libaio-devel

  3. Test the client
    $ sqlplus username/password@//databasehost:1521/sidvalue
    SQL*Plus: Release 19.0.0.0.0 - Production on Thu Nov 25 12:42:35 2021
    Version 19.3.0.0.0
    Copyright (c) 1982, 2019, Oracle.  All rights reserved.
    Connected to:
    Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
    Version 19.3.0.0.0

  1. Run a sample SQL query to test the connection.
    SQL> select BANNER from v$version;               
    BANNER
    --------------------------------------------------------------------------------
    Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production

In this step, you set up cx_Oracle, an open-source Python interface to Oracle.

  1. Install cx_Oracle.
    pip3 install cx_Oracle==7.3

  2. Check the cx_oracle version.
    pip3 list | grep cx-Oracle
    cx-Oracle (7.3.0)

Set-up and Configure Performance Metrics Script

In this step, you set up the performance metrics script.

Clone the Sumo Logic Python performance metrics script and configuration files from the git repo inside a folder (for example: oracle_script) using below command:

$ git clone git@github.com:SumoLogic/sumologic-oracle-perf-monitor.git

Once the script is cloned, navigate to oracle_script/sumooracle
Two files oracle-perf-monitor.cfg and oracle-perf-monitor.py should be present.

Make the following updates to the script configuration file (oracle-perf-monitor.cfg). In the [dbLogin] section, supply values for each parameter:
If you do not wish to keep the password in the configuration file, keep the oraPassword field blank. You can set the password in the environment variable DB_PASSWORD.

To set environment variable , add variable in your  ~/.bash_profile file in your environment

export DB_PASSWORD = <<DB Password>>

The script first tries to read the password from the config file, if the password is not found in the config file, it searches for an environment variable DB_PASSWORD.

 [dbLogin]

  • oraUser= database user id       example myuser123

  • oraPassword= user password      example mypwd123

  • oraHost=server name        example ip-101-25-17-22

  • oraPort=port number             example 1521

  • oraInstance=oracle instance SID (SID_NAME)          example XE

$ python3 oracle-perf-monitor.py

Configure the Sumo Logic Script Source

  1. In Sumo Logic, go to Manage Data > Collection > Collection.

  2. Find the name of the installed collector to which you'd like to add a Source. Click Add. Then choose Add Source from the pop-up menu.

  3. Select Script for the Source type. Collectors using version 19.245-4 and later do not allow Script Sources to run by default. To allow Script Sources you need to set the Collector parameter enableScriptSource in user.properties to true and restart the Collector.

    1. For Name enter any name you like, for instance, Oracle Server Script

    2. The Description is optional.

    3. For Source Category, enter the desired category. It can be any value you like, for example, DB/Oracle/DBQueryScript.

    4. Fields. Set the following fields:

      • component = database

      • db_system = oracle

      • db_cluster = <Your_Oracle_Cluster_Name>. Enter Default if you do not have one.

      • environment = <Your_Environment_Name>(for example, Dev, QA, or Prod)

    5. For Frequency, select desired frequency, for instance, 5 minutes

    6. For Specify a timeout for your command, select a value that is long enough that long-running queries can complete, for instance, 30 seconds.

    7. For Command, select /usr/bin/python

    8. For Script, enter a path to the script, for example, oracle_script/sumooracle/oracle-perf-monitor.py

    9. For Working Directory, enter a directory, for example,
      oracle_script/sumooracle

    10. Click Save.

After a few minutes, your new Source should be propagated down to the Collector and will begin submitting your Oracle log files to the Sumo Logic service.