JAVA Heap Analysis

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Keywords: java notes

JAVA Heap Analysis

This is just a note for my personal use. To verify the Java heap usage, we can use jstat command.

jstat -gc <PID>

S0C - Eden space capacity
S1C - Survivor space capacity
EC - Eden space capacity
OC - Old space capacity

S0U - Eden space utilization
S1U - Survivor space utilization
EU - Eden space utilization
OU - Old space utilization

Heap Utilizaiton = S0U + S1U + EU + OU
Heap Capacity = S0C + S1C + EC + OC