4.5 Series Release Notes#
maxoperator to combine different metrics after applied operations. Example:
(max (metric metric1 mean) (* (metric metric2 mean) 100))
rateofchangesecoperator to calculate changes between metric measures per second. Example:
(* (/ (rateofchangesec (metric cpu mean)) 1000000000) 100))
The Dynamic Aggregates API now returns a 404 response when metrics are not found rather than a 400 response. This allows differentiation between an invalid request to the API vs a lack of metric data due to resources not yet being present and is inline with the deprecated metric aggregate API behaviour.
Users can now configure the
cleanup_batch_size. This limits the amount of metrics being deleted during a run of the janitor thereby preventing out-of-memory errors.
Now all default policies are implemented in code, and the default policy rules are no longer required in policy configuration.
Users having a large amount of metrics being deleted regularly might needs to increase
cleanup_batch_sizeto a higher value so that the janitor can keep up.
Now Gnocchi uses policy.yaml as its default policy file instead of policy.json.
Default policy.json has been deprecated and will be removed in a future release. Use policy.yaml instead.