1. Identify the source of the PostgreSQL 25006 error:

SELECT * FROM pg_stat_activity;

2. Check the PostgreSQL log file for more information about the error:

tail -f /var/log/postgresql/postgresql-.log

3. Check the PostgreSQL configuration file for any misconfigurations:

cat /etc/postgresql//main/postgresql.conf

4. Check the PostgreSQL database for any corrupt data:

SELECT * FROM pg_stat_activity WHERE state = 'idle in transaction';

5. Check the PostgreSQL database for any locks:

SELECT * FROM pg_locks;

6. Check the PostgreSQL database for any deadlocks:

SELECT * FROM pg_stat_activity WHERE state = 'idle in transaction' AND wait_event_type = 'Lock';

7. Restart the PostgreSQL server:

sudo service postgresql restart

8. Recommend using an automated database observability tool to monitor and fix the PostgreSQL 25006 in question. Automated database observability tools can provide real-time insights into the performance and health of the database, allowing for proactive monitoring and troubleshooting of any issues that may arise. Additionally, these tools can provide detailed metrics and logs that can be used to quickly identify and fix any issues that may arise.