PostgreSQL Long Queries Test

This test reports the number of queries that are executing for each database. Using this test, you can identify the query that takes too long to execute and thus the resource-intensive queries to a database can be isolated quickly.

Target of the test : PostgreSQL server

Agent deploying the test: An internal/remote agent

Outputs of the test : One set of results for the target PostgreSQL server

Configurable parameters for the test
  1. TEST PERIOD – How often should the test be executed.
  2. Host – The IP address of the server.
  3. Port – The port on which the server is listening. The default port is 5432.

  4. User – In order to monitor a PostgreSQL server, you need to manually create a special database user account in every PostgreSQL database instance that requires monitoring. When doing so, ensure that this user is vested with the superuser privileges. The sample script we recommend for user creation for eG monitoring is:

    CREATE ROLE eguser LOGIN

    ENCRYPTED PASSWORD {‘eguser password’}

    SUPERUSER NOINHERIT NOCREATEDB NOCREATEROLE;

    The name of this user has to be specified in the USERNAME text box.

  5. Password- The password associated with the above user name (can be ‘NULL’). Here, ‘NULL’ means that the user does not have any password.
  6. Confirm password – Confirm the password (if any) by retyping it here.
  7. dbname - The name of the database to connect to. The default is “postgres”.

  8. exclude db - Specify a comma-separated list of databases that need to be excluded from monitoring. By default, this is set to rdsadmin.

    9. Note:

    If you are monitoring a PostgreSQL server on the AWS EC2 cloud, then make sure that you do not remove 'rdsadmin' from the EXCLUDE DB list.

  9. elapsed time - 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.
  10. ssl - The name of this user has to be specified in the USERNAME text box.

  11. 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
Measurement Description Measurement Unit Interpretation

Number of queries:

Indicates the number of queries currently executing on the database server that have been running for more time than the configured ELAPSED TIME.

Number

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.