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Oracle DB

Plugin: python.d.plugin Module: oracledb

Overview

This collector monitors OracleDB database metrics about sessions, tables, memory and more.

It collects the metrics via the supported database client library

This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.

In order for this collector to work, it needs a read-only user netdata in the RDBMS.

Default Behavior

Auto-Detection

When the requirements are met, databases on the local host on port 1521 will be auto-detected

Limits

The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.

Metrics

Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

These metrics refer to the entire monitored application.

Per Oracle DB instance

This scope has no labels.

Metrics:

MetricDimensionsUnit
oracledb.session_counttotal, activesessions
oracledb.session_limit_usageusage%
oracledb.logonslogonsevents/s
oracledb.physical_disk_read_writesreads, writesevents/s
oracledb.sorts_on_diskssortsevents/s
oracledb.full_table_scansfull table scansevents/s
oracledb.database_wait_time_ratiowait time ratio%
oracledb.shared_pool_free_memoryfree memory%
oracledb.in_memory_sorts_ratioin-memory sorts%
oracledb.sql_service_response_timetimeseconds
oracledb.user_rollbacksrollbacksevents/s
oracledb.enqueue_timeoutsenqueue timeoutsevents/s
oracledb.cache_hit_rationbuffer, cursor, library, row%
oracledb.global_cache_blockscorrupted, lostevents/s
oracledb.activityparse count, execute count, user commits, user rollbacksevents/s
oracledb.wait_timeapplication, configuration, administrative, concurrency, commit, network, user I/O, system I/O, scheduler, otherms
oracledb.tablespace_sizea dimension per active tablespaceKiB
oracledb.tablespace_usagea dimension per active tablespaceKiB
oracledb.tablespace_usage_in_percenta dimension per active tablespace%
oracledb.allocated_sizea dimension per active tablespaceB
oracledb.allocated_usagea dimension per active tablespaceB
oracledb.allocated_usage_in_percenta dimension per active tablespace%

Alerts

There are no alerts configured by default for this integration.

Setup

Prerequisites

Install the python-oracledb package

You can follow the official guide below to install the required package:

Source: https://python-oracledb.readthedocs.io/en/latest/user_guide/installation.html

Create a read only user for netdata

Follow the official instructions for your oracle RDBMS to create a read-only user for netdata. The operation may follow this approach

Connect to your Oracle database with an administrative user and execute:

CREATE USER netdata IDENTIFIED BY <PASSWORD>;

GRANT CONNECT TO netdata;
GRANT SELECT_CATALOG_ROLE TO netdata;

Edit the configuration

Edit the configuration troubleshooting:

  1. Provide a valid user for the netdata collector to access the database
  2. Specify the network target this database is listening.

Configuration

File

The configuration file name for this integration is python.d/oracledb.conf.

You can edit the configuration file using the edit-config script from the Netdata config directory.

cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config python.d/oracledb.conf

Options

There are 2 sections:

  • Global variables
  • One or more JOBS that can define multiple different instances to monitor.

The following options can be defined globally: priority, penalty, autodetection_retry, update_every, but can also be defined per JOB to override the global values.

Additionally, the following collapsed table contains all the options that can be configured inside a JOB definition.

Every configuration JOB starts with a job_name value which will appear in the dashboard, unless a name parameter is specified.

Config options
NameDescriptionDefaultRequired
update_everySets the default data collection frequency.5no
priorityControls the order of charts at the netdata dashboard.60000no
autodetection_retrySets the job re-check interval in seconds.0no
penaltyIndicates whether to apply penalty to update_every in case of failures.yesno
userThe username for the user account.noyes
passwordThe password for the user account.noyes
serverThe IP address or hostname (and port) of the Oracle Database Server.noyes
serviceThe Oracle Database service name. To view the services available on your server run this query, select SERVICE_NAME from gv$session where sid in (select sid from V$MYSTAT).noyes
protocolone of the strings "tcp" or "tcps" indicating whether to use unencrypted network traffic or encrypted network trafficnoyes

Examples

Basic

A basic example configuration, two jobs described for two databases.

local:
user: 'netdata'
password: 'secret'
server: 'localhost:1521'
service: 'XE'
protocol: 'tcps'

remote:
user: 'netdata'
password: 'secret'
server: '10.0.0.1:1521'
service: 'XE'
protocol: 'tcps'

Troubleshooting

Debug Mode

To troubleshoot issues with the oracledb collector, run the python.d.plugin with the debug option enabled. The output should give you clues as to why the collector isn't working.

  • Navigate to the plugins.d directory, usually at /usr/libexec/netdata/plugins.d/. If that's not the case on your system, open netdata.conf and look for the plugins setting under [directories].

    cd /usr/libexec/netdata/plugins.d/
  • Switch to the netdata user.

    sudo -u netdata -s
  • Run the python.d.plugin to debug the collector:

    ./python.d.plugin oracledb debug trace

Do you have any feedback for this page? If so, you can open a new issue on our netdata/learn repository.