Get pending message per subject in stream

[suchen-sci]

Hi team,

I'm curious if there's a method to obtain information about all pending messages per subject within a stream.

For instance, if I have a stream with subjects such as sub.123, sub.234, sub.345 and so on (maybe 10k+ subjects in a stream), and each subject has zero or one or more durable consumers (all with same durable name).

How can I determine the number of pending messages for each subject? This information would help me decide if I need to create additional consumers for any particular subject. Some of the subject may have zero consumer since there are no messages there for them to consume.

Best wishes!

[neilalexander]

Instead of trying to query for pending info, which may end up being expensive if done repeatedly, you may instead want to consider a pattern whereby you have a separate headers-only consumer that subscribes to sub.> and then use those events to create more durable consumers that are subject-filtered if needed.