michaeljmarshall opened a new pull request, #17248: URL: https://github.com/apache/pulsar/pull/17248
Fixes https://github.com/apache/pulsar/issues/16584 ### Motivation With the `RangeCache`, it is hard to reason about its behavior other than cache hits/misses or the cache's size hitting the limit and triggering a size based eviction. This PR adds 3 new metrics to help provide additional insight into the cache's behavior. It adds `pulsar_ml_cache_inserted_entries_total`, `pulsar_ml_cache_evicted_entries_total`, and `pulsar_ml_cache_entries`. ### Modifications * Add new metrics for cache insertion, eviction, and current number of entries. * Add new methods to the `ManagedLedgerFactoryMXBean` interface. * Update several method return values in the `RangeCache`. * Update tests. ### Verifying this change This change is covered by modified tests that already existed. ### Does this pull request potentially affect one of the following parts: There is a breaking change to the `RangeCache` class for the `clear` and the `evictLEntriesBeforeTimestamp` methods. The previous result was a `long`, and now it is a `Pair<Integer, Long>`. The new result matches the same style as `evictLeastAccessedEntries`. Given that this class is only meant for use within the broker, I think it is reasonable to break these methods. I will send a note to the mailing list. ### Documentation - [x] `doc` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
