GC 策略測試

測試代碼：

package com.steel.gc;

import java.util.ArrayDeque;
import java.util.Deque;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import org.apache.log4j.Logger;
import org.apache.log4j.spi.LoggerFactory;

public class Produce implements Runnable {
	 
	  private static ScheduledExecutorService executorService = Executors.newScheduledThreadPool(2);
	 
	  private Deque<byte[]> deque;
	  private int objectSize;
	  private int queueSize;
	 
	  public Produce(int objectSize, int ttl) {
	    this.deque = new ArrayDeque<byte[]>();
	    this.objectSize = objectSize;
	    this.queueSize = ttl * 1000;
	  }
	 
	  public void run() {
	    for (int i = 0; i < 100; i++) {
	      deque.add(new byte[objectSize]);
	      if (deque.size() > queueSize) {
	        deque.poll();
	      }
	    }
	  }
	 
	  public static void main(String[] args) throws InterruptedException {
		
	    executorService.scheduleAtFixedRate(new Produce(200 * 1024 * 1024 / 1000, 5), 0, 100, TimeUnit.MILLISECONDS);
	    executorService.scheduleAtFixedRate(new Produce(50 * 1024 * 1024 / 1000, 120), 0, 100, TimeUnit.MILLISECONDS);
	    TimeUnit.MINUTES.sleep(5);
	    executorService.shutdownNow();
	  }
	}

方案一：

方案二：

 

方案三：

並且該策略還沒有測試完成，報內存不足，出錯