Hi Jose, We did indeed run into a perf regression related to increased fetch request rate due to hw propagation to followers:
https://issues.apache.org/jira/browse/KAFKA-9731 Ismael On Wed, Apr 30, 2025 at 12:34 PM José Armando García Sancio <jsan...@confluent.io.invalid> wrote: > Hi Alyssa, > > On Wed, Apr 30, 2025 at 12:52 PM Alyssa Huang > <ahu...@confluent.io.invalid> wrote: > > Is the intent to say that in addition to all the current conditions, > > the HWM check is an additional condition that *must *be met in order for > > the fetch request to be parked? Just confirming since I'm not sure if I > > should interpret "may also park" too literally. > > It is an additional condition that may be considered. The difficulty > and my hesitation in being prescriptive in the implementation is that > completing the FETCH request because of the HWM may impact the > utilization and throughput of Kafka. In many cases there is a > trade-off between lower latencies and higher throughput. > > My position is that the remote HWM can be used when handling FETCH > requests but the exact handling and implementation may change. > > Thanks, > -- > -José >
