use threadlocal to decrease ObjectSizeCalculator memory use #15070
Description
in class ObjectSizeCalculator
everytime call static function getObjectSize will new ObjectSizeCalculator, cost much memory, Gc busy. use threadlocal will decrease memory use
{code:java}
/**
* Given an object, returns the total allocated size, in bytes, of the object and all other objects reachable from it.
* Attempts to to detect the current JVM memory layout, but may fail with {@link UnsupportedOperationException};
*
* @param obj the object; can be null. Passing in a {@link java.lang.Class} object doesn't do anything special, it
* measures the size of all objects reachable through it (which will include its class loader, and by
* extension, all other Class objects loaded by the same loader, and all the parent class loaders). It doesn't
* provide the size of the static fields in the JVM class that the Class object represents.
* @return the total allocated size of the object and all other objects it retains.
* @throws UnsupportedOperationException if the current vm memory layout cannot be detected.
*/
public static long getObjectSize(Object obj) throws UnsupportedOperationException {
return obj == null ? 0 : new ObjectSizeCalculator(CurrentLayout.SPEC).calculateObjectSize(obj);
} {code}
JIRA info
- Link: https://issues.apache.org/jira/browse/HUDI-3652
- Type: Improvement