Hi @Rohit_Singhal - great to hear you’re trying out 6.5.x eventing. Yes, the Pause/Resume feature is an addition in 6.5.0 and hence not available in 6.0.x.
You can test pause/resume in 6.5.0 and later by deploying a handler. Then you can pause the handler - via UI, couchbase-cli or Eventing REST API.
When a function is paused, it will not run any code contained in the handler, including timers. Once it is resumed, it will pick up where it was paused and process all pending document mutations and timers that may have come due when it was paused. (Note that if a given document is modified multiple times when it was paused, the handler may see only the final update to that document).
Please let us know if you have any questions!