I don’t know how other people monitor their dhis2 tomcat server but i found this simple way to get all important data of the server in real time, just by enable Tomcat manager
You will see the heap status, active sessions, and thread. Any thread that causes problem can be easily identified, i.e. unrealistically long process time
Here is example, if any one have problem with your current server, pls let me know, I can take a look.
Another interesting fact is that heap will increased when number of sessions increases, i.e. number of concurrent users. 100 active users can consume 20% of Old Gen (in 6G of total heap space) and it seems to be very linear. If 80% of Old Gen is a safe threshold for the server, this server probably can serve about 500 concurrent users. This is really useful to guess/calculate the capacity of your server.
Of course, its important that what actions users will perform.
