Hi, I filed a jira a few weeks ago around some log compaction ratio behavior we were seeing. Now that the 0.11 vote done and release is out, I wanted to follow up on it. Jira is here: https://issues.apache.org/jira/projects/KAFKA/issues/KAFKA-5452.
Details are in the jira, but long story short, after much testing, we were seeing that aggressive log compaction ratios were performing just as well as more conservative ratios. Fundamentally I would expect there to be some sort of hit, but seeing that the data shows there wasn't, we wanted to raise this to the rest of the community and see if anyone else has observed similar behavior. The motivation behind this is to see if we might consider changing the default from 0.5. This could help in preventing confusion around duplicate keys in low volume log-compacted topics use cases. Thanks, Jeff Chao Heroku Kafka