Shawyeok commented on issue #21442: URL: https://github.com/apache/pulsar/issues/21442#issuecomment-1792001008
Sorry for late reply. The current publish rate limiting is based on setting the `autoRead` flag of the Netty channel to false. However, `autoRead` is just a hint in Netty, not a guarantee (if anyone is familiar with this, a detailed explanation would be great). As a result, topics that have already been rate-limited may call the `isTopicPublishRateExceeded` method multiple times before the next rate-limiting period arrives, which is unnecessary. So, an optimization I'm thinking of is to set a flag after a topic triggers rate limiting, to avoid having to check whether the topic has already been rate-limited through the `isTopicPublishRateExceeded` method each time. Of course, we can also optimize the implementation of `org.apache.pulsar.common.util.RateLimiter`. Perhaps an implementation based on Compare-And-Swap (CAS) would perform better than `synchronized`. All of these ideas need to be validated through experimentation. -- 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]
