Thanks David ( @dbarranco ) for the response. This is the first disadvantage I have spotted so far of using Bitnami stack, that I cannot upgrade the components.
We are in a situation where a bug in Apache mod_http2 is causing the CPU to spike up which has been fixed in Apache 2.4.25.
The issue is: When the client stops sending data and closes the connection, mod_http2 doesn't detect that the client has left and continues to "read" request data (until the request times out because of the server's TimeOut value).
This is a big problem when bots (like Facebook etc) try to scan the site for ads etc. The CPU takes a big hit as multiple connections are kept open, denying legit connections.
Can we compile the mod_http2 latest version for Magento Bitnami Apache 2.4.23 stack? We can test is at our end too. Let me know if you could help us here. Would appreciate the help.