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PostgreSQL is a powerful, open-source object-relational database system that uses and extends the SQL language. It is known for its robustness, extensibility, and standards compliance. PostgreSQL is often used for web applications, data warehousing, and as a primary database for many enterprise applications.
The alert 'Database Connection Count High' indicates that the number of active connections to the PostgreSQL database is nearing the maximum limit set by the max_connections
parameter. This can lead to performance degradation or even denial of service if new connections are unable to be established.
This alert is triggered when the number of active database connections approaches the threshold defined in your monitoring setup. It is crucial to monitor this metric because exceeding the connection limit can prevent new client connections, impacting application availability.
High connection counts can indicate inefficient connection management in your application or insufficient database resources. It can also suggest that your application is scaling beyond the current database configuration's capacity.
Implementing a connection pooler like PgBouncer can help manage database connections efficiently. Connection pooling reduces the overhead of establishing new connections and can significantly improve performance.
pgbouncer -d /etc/pgbouncer/pgbouncer.ini
If your server resources allow, consider increasing the max_connections
setting in your postgresql.conf
file. This change requires a database restart to take effect.
# Edit postgresql.conf
max_connections = 200
After editing, restart PostgreSQL:
sudo systemctl restart postgresql
Ensure that your application is closing connections properly. Unclosed connections can accumulate and exhaust the connection pool. Review your application's database connection logic and ensure connections are closed in a finally
block or using a context manager.
For more information on managing PostgreSQL connections, refer to the official PostgreSQL documentation. Additionally, consider reading about connection management best practices to optimize your database performance.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)