postgres_total_connection_utilization.md 2.3 KB
Understand the alert
This alert monitors the total connection utilization of a PostgreSQL database. If you receive this alert, it means that your PostgreSQL database is experiencing a high demand for connections. This can lead to performance degradation and, in extreme cases, could potentially prevent new connections from being established.
What does connection utilization mean?
Connection utilization refers to the percentage of database connections currently in use compared to the maximum number of connections allowed by the PostgreSQL server. A high connection utilization implies that the server is handling a large number of concurrent connections, and its resources may be strained, leading to decreased performance.
Troubleshoot the alert
- Check the current connections to the PostgreSQL database:
You can use the following SQL query to check the number of active connections for each database:
SELECT datname, count(*) FROM pg_stat_activity GROUP BY datname;
or use the following command to check the total connections to all databases:
SELECT count(*) FROM pg_stat_activity;
- Identify the source of increased connections:
To find out which user or application is responsible for the high connection count, you can use the following SQL query:
SELECT usename, application_name, count(*) FROM pg_stat_activity GROUP BY usename, application_name;
This query shows the number of connections per user and application, which can help you identify the source of the increased connection demand.
- Optimize connection pooling:
If you are using an application server, such as pgBouncer, that supports connection pooling, consider adjusting the connection pool settings to better manage the available connections. This can help mitigate high connection utilization.
- Increase the maximum connections limit:
If your server has the necessary resources, you may consider increasing the maximum number of connections allowed by the PostgreSQL server. To do this, modify the max_connections configuration parameter in the postgresql.conf file and then restart the PostgreSQL service.