We monitor “Delayed Operation Purgatory” metrics of our brokers, and we found the the “purgatorysize” number can be very high during busy time, it can be over 250K.
I have tried a few changes on client applications, e.g. adjust “fetch.max.wait.ms”, but it does not help on this issue, anyone has idea what other metrics that I should look into, or any configs that I should adjust?
Thanks,
Nik