Expose active Redis connection count

[nakedible-p]

Describe the feature

It would be nice to be able to query the client about at least some status and statistics information to be logged. The first piece of information that's interesting is the currently active connection count.

Use Case

We want to log the currently active connection count towards Redis, so we can make a metric of it and track it. It's also not obvious what that is without getting the real data as the cluster layout affects it. It's also a resource tracking issue possibly. There's a ton of other values that could be exposed as well.

Proposed Solution

Add a simple get_active_connection_count() call. Alternatively, something like get_statistics() which would return an object which has this value and a bunch of other values. Something like this is a good example of a full blown solution: https://docs.rs/tokio/latest/tokio/runtime/struct.RuntimeMetrics.html

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

Client version used

1.1.0

Environment details (OS name and version, etc.)

irrelevant

[avifenesh]

This information is available using INFO, in connected_clients field and a bunch of a lot of extra stats you can retrieve.
connected_clients exclude replica's connection.
Do you have a special case which this field not cover?

[nakedible-p]

Oh, perhaps I wasn't clear. I want info logged from the behaviour of this specific client – not INFO from the remote Redis server. I want the number of connections for this client, as given by the client itself, not as given by the server.

[asafpamzn]

Thanks,

I agree that we should improve and expose the clients metrics. I agree that it is more than just connected clients, can be latency, errors, internal reconnects attempts...
@eifrah-aws FYI.

[asafpamzn]

Marking a candidate for 1.2

[eifrah-aws]

@nakedible-p note that for this solution, I have chosen to take the path of providing telemetry for the entire process. i.e. if you have 2 clients opened, it will report all opened connections for both of them (the sum of it). In addition, it will also report how many active clients there are

[ikolomi]

@asafpamzn i dont see how it makes into 1.2 - lets discuss

Binding status:
Java -done
Python - @BoazBD WIP
Node - @Muhammad-awawdi-amazon WIP

[eifrah-aws]

Marking this as completed. We now have get_statistics (getStatistics for Java) API for GlideClusterClient and GlideClient which returns a Map. This is supported for Node, Java & Python