linux查看jvm堆栈大小

# 列出所有Java进程
jps

# 假设你的Java进程ID是12345，获取该进程的堆栈大小信息
jinfo -flag HeapSize 12345
jinfo -flag MaxHeapSize 12345

# 假设你的Java进程ID是12345，获取该进程的堆栈大小信息
jstat -gc 12345

# 假设你的Java进程ID是12345，生成内存映射信息
jmap -heap 12345

# 查看所有Java进程的堆栈大小
ps -eo pid,cmd,%mem,%cpu --sort=-%mem | grep java

# 假设你的Java进程ID是12345，查看该进程的堆栈大小
ps -p 12345 -o vsz,rss

import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryUsage;

public class HeapSizeExample {
    public static void main(String[] args) {
        MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();
        MemoryUsage heapMemoryUsage = memoryBean.getHeapMemoryUsage();

        System.out.println("Initial Heap Size: " + heapMemoryUsage.getInit() / 1024 / 1024 + " MB");
        System.out.println("Used Heap Size: " + heapMemoryUsage.getUsed() / 1024 / 1024 + " MB");
        System.out.println("Committed Heap Size: " + heapMemoryUsage.getCommitted() / 1024 / 1024 + " MB");
        System.out.println("Max Heap Size: " + heapMemoryUsage.getMax() / 1024 / 1024 + " MB");
    }
}