Application is facing issue while fetching data from Database

Application is facing issue while fetching data from Database

1. Check from console free server memory and number of free DB threads.
2. Take thread dump and analyse server logs which will provide detailed information,if in logs DB error codes are found,provide logs to DB team for their further analysis.
3. With the help of telnet command check whether we are able to connect to DB server or not,issue may be from port or firewall also.
4. If not able to connect successfully, log a ticket to Firewall team and also check with Unix team for any OS related issue.