1. Check the PostgreSQL log files for any errors or warnings that may indicate the source of the issue.

tail -f /var/log/postgresql/postgresql-9.6-main.log

2. Check the PostgreSQL configuration files for any settings that may be causing the issue.

cat /etc/postgresql/9.6/main/postgresql.conf

3. Check the PostgreSQL system tables for any issues that may be causing the issue.

SELECT * FROM pg_stat_activity;

4. Check the PostgreSQL system processes for any issues that may be causing the issue.

ps aux | grep postgres

5. Check the PostgreSQL system memory usage for any issues that may be causing the issue.

free -m

6. Check the PostgreSQL system disk usage for any issues that may be causing the issue.```df -h```

df -h

7. Once the source of the issue has been identified, take the necessary steps to fix the issue.

8. To ensure that the issue does not reoccur, it is recommended to use an automated database observability tool to monitor and fix the PostgreSQL 2200G in question. This tool can provide real-time insights into the performance of the database, allowing for quick and easy identification of any issues that may arise. It can also provide automated alerts when any issues are detected, allowing for quick resolution of any issues that may arise.