I am doing tests on hazelcast recovery
The memory usage is as following:

10734947 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Checking memory after initial load

10740370 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Initial memory usage for node 172.31.141.46 is:11843926024
10740370 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Initial memory usage for node 172.31.143.123 is:12024537544
10740370 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Initial memory usage for node 172.31.141.16 is:11971849376
10740370 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Initial memory usage is:35840312944

10740370 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Shutting down first node
10755911 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Shuttdown completed

10755911 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Checking memory after shutdown
10757273 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Memory usage after shutdown for 
node 172.31.143.123 is:16348041376
10757273 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Memory usage after shutdown for node 172.31.141.16 is:17312560544
10757273 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Memory usage after shutdown is:33660601920

11291119 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Memory usage after recovery for node 172.31.141.46 is:12522915128
11291119 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Memory usage after recovery for node 172.31.143.123 is:17429340520
11291119 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Memory usage after recovery for node 172.31.141.16 is:16136065264
11291119 [main] INFO com.m2mair.netqos.core.CacheRecoveryTest  - Memory usage after recovery is:46088320912

It is clearly seen that after node is getting back and receives the paritions belonging to him , other nodes memory is not going down , e.g those paritions remains also there….

What can be done to release the memory back after node going down and recover back? The version is 5.3.2