They work simultaneously, topic with cleanup policy of DELETE , will clean old message older than the retention period and also deletes the oldest messages when retention bytes limit is breached, notice this limit is for each partition in a topic and not total size of the topic, notice as well that deletion kicks off only on "closed" message segments
בתאריך יום ג׳, 1 ביוני 2021, 20:57, מאת sunil chaudhari < sunilmchaudhar...@gmail.com>: > Hi, > Suppose: > Maximum Topic size is set to 1 GB > Retention hours: 168 > What happens in case topic size reaches the maximum size before 168 > hours. > Will it delete few messages before its expiry though they are eligible to > stay for 168 hrs? > > > Regards, > Sunil. >