[rabbitmq-discuss] RabbitMQ Management HTTP API historical samples question

Thu Aug 29 11:29:55 BST 2013

Hmm, possibly that documentation should be clarified. Really it will 
attempt to return samples up to (the_present modulo lengths_incr), so 
that the inter-sample spacing is consistent.

For the latest value, check the value given outside "samples" - i.e. 
queue_totals.messages in your example.

Cheers, Simon

On 29/08/2013 8:35AM, Наиль Салихов wrote:
> Hello, in documentation in section about historical samples there is
> sentence — "The end of the range returned will always correspond to the
> present", but API does not return me actual information about message
> total count, for example:
> *http://localhost:15672/api/overview?columns=node,queue_totals&lengths_age=600&lengths_incr=100*
> *response:*
>
>     {
>     "queue_totals": {
>     "messages": 65,
>     "messages_details": {
>     "rate": -0.4,
>     "samples": [{
>     "sample": 65,
>     "timestamp": 1377761000000
>     },
>     {
>     "sample": 88,
>     "timestamp": 1377760900000
>     },
>     {
>     "sample": 108,
>     "timestamp": 1377760800000
>     },
>     ...
>     }
>
> But last element in samples array doesn't correspond to present, if i
> use less length increment, the information will be more accurate:
> *http://localhost:15672/api/overview?columns=node,queue_totals&lengths_age=600&lengths_incr=1*
> *response:*
>
>     {
>     "queue_totals": {
>     "messages": 53,
>     "messages_details": {
>     "rate": 0.0,
>     "samples": [{
>     "sample": 53,
>     "timestamp": 1377761059000
>     },
>     {
>     "sample": 53,
>     "timestamp": 1377761058000
>     },
>     {
>     "sample": 53,
>     "timestamp": 1377761057000
>     },
>
>     ...
>
>     }
>
> How I can get info about queues messages count for last N seconds
> including real-time information?
>
>
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-- 
Simon MacMullen
RabbitMQ, Pivotal