关于内存大小设置以及预测

Hi all， 最近也是遇到比较常见的内存溢出的错误OutOfMemoryError: Java heap space，JM:1g TM:2g，简单粗暴的设置成2g、4g就可以运行了， INFO [] - Loading configuration property: cluster.termination-message-path, /flink/log/termination.log INFO [] - Final TaskExecutor Memory configuration: INFO [] - Total Process Memory: 3.906gb (4194304000 bytes) INFO [] - Total Flink Memory: 3.266gb (3506438138 bytes) INFO [] - Total JVM Heap Memory: 1.508gb (1619001315 bytes) INFO [] - Framework: 128.000mb (134217728 bytes) INFO [] - Task: 1.383gb (1484783587 bytes) INFO [] - Total Off-heap Memory: 1.758gb (1887436823 bytes) INFO [] - Managed: 1.306gb (1402575276 bytes) INFO [] - Total JVM Direct Memory: 462.400mb (484861547 bytes) INFO [] - Framework: 128.000mb (134217728 bytes) INFO [] - Task: 0 bytes INFO [] - Network: 334.400mb (350643819 bytes) INFO [] - JVM Metaspace: 256.000mb (268435456 bytes) INFO [] - JVM Overhead: 400.000mb (419430406 bytes)

请问有没有指标能够事前估算JM、TM需要的内存大小？*来自志愿者整理的flink