Hi Lu, The image seems not be able to shown due to the mail server limitation, could you upload it somewhere and paste the link here ?
Logically, I think zigzag usually due to there are some small object get created and eliminated soon in the heap. Are you running a SQL job or a DataStream job ? Best, Yun ------------------------------------------------------------------ Sender:Lu Niu<qqib...@gmail.com> Date:2021/04/05 12:06:24 Recipient:dev@flink.apache.org<dev@flink.apache.org> Theme:Zigzag shape in TM JVM used memory Hi, Flink dev We observed that the TM JVM used memory metric shows zigzag shape among lots of our applications, although these applications are quite different in business logic. The upper bound is close to the max heap size. Is this expected in flink application? Or does flink internally aggressively pre-allocate memory? app1 app2 app3 Best Lu
