内存溢出要怎么处理呢？？

Question

内存溢出要怎么处理呢？
java.lang.OutOfMemoryError: Java heap space
报的就是这个异常，我该注意些什么，才能避免这个问题呢？我就测试15000条数据，就出现了这个异常，表示压力很大。

Answer 1

Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space

Answer 2

Exception in thread "Thread-6" java.lang.OutOfMemoryError: Java heap space
	at com.navi.common.utils.WriteTool.writeTXT(WriteTool.java:56)
	at com.navi.common.utils.SimpleThread.run(SimpleThread.java:77)
Exception in thread "Thread-40" java.lang.OutOfMemoryError: Java heap space
	at com.navi.common.utils.WriteTool.writeTXT(WriteTool.java:56)
	at com.navi.common.utils.SimpleThread.run(SimpleThread.java:77)
Exception in thread "Thread-38" java.lang.OutOfMemoryError: Java heap space
	at com.navi.common.utils.WriteTool.writeTXT(WriteTool.java:56)
	at com.navi.common.utils.SimpleThread.run(SimpleThread.java:77)
Exception in thread "Thread-32" java.lang.OutOfMemoryError: Java heap space
	at com.navi.common.utils.WriteTool.writeTXT(WriteTool.java:56)
	at com.navi.common.utils.SimpleThread.run(SimpleThread.java:77)
Exception in thread "Thread-44" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-46" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-48" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-54" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-50" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-42" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-28" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-26" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-24" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-30" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-20" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-18" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-16" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-14" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-12" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-10" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-45" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-43" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-39" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-37" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-35" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-33" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-31" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-29" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-27" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-23" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-19" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-21" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-17" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-15" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-53" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-13" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-51" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-49" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-11" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-52" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-47" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-25" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-41" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-22" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-36" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-7" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-8" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-9" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-5" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-34" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-504" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Thread-503" java.lang.OutOfMemoryError: Java heap space

Answer 3

(╯﹏╰）

Answer 4

(╯﹏╰）是我错了，之前要测试4w条数据，貌似就出现过一次内存溢出，我想，就多在后面添几个0吧，也没数，就内存溢出了。以后都要数一下。算算

Answer 5

com.navi.common.utils.WriteTool，最被其它语言诟病的包结构，看着都怕，要点击多少下呀，这是。。

Answer 6

我晕倒,你把缓冲区设置成了1G,你的内存多大?能一次有1G的空余内存分配吗?

Answer 7

我知道我为什么出现这个异常了。byte[] b = new byte[1024000000]，是这个1024000000设置的问题了，就因为这句话，导致了内存溢出，具体的原因我说不出来，感觉就这么设置之后，就会导致内存溢出了，当我去掉一个0之后，问题就解决了。

Answer 8

买根500G的内存条看看

Answer 9

是eclipse溢出还是你的程序溢出哦。

Answer 10

死循环没有，貌似我占用内存太大了，就溢出了。

Answer 11

Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space

Answer 12

估计是程序某一处死循环，内存消耗巨大

Answer 13

引用来自“黑菜妞妞”的答案

引用来自“红薯”的答案

java -Xmx1024m xxxxxx

Answer 14

你看你这问题问的，也没说Eclipse，将那个 256m 改大

Answer 15

好吧，我先改一下256为1024

Answer 16

不让用1024，用1024eclipse启动不起来，用512吧，512可以。

Answer 17

引用来自“红薯”的答案

java -Xmx1024m xxxxxx

Answer 18

首先要设定合适的Java虚拟机堆大小。然后就是检查代码中是否存在内存泄漏。

Answer 19

在eclipse.ini中修改吗？？

Answer 20

java -Xmx1024m xxxxxx

Answer 21

首先从代码上面找问题吧

代码设计确实没问题再调内存设置

Answer 22

这么说你明白了么。

Answer 23

O(∩_∩)O哈哈~明白了，很生动！！比老师讲的好！！(^o^)/~理解了，我再优化一下代码。非常感谢！！(*^__^*) 嘻嘻……

Answer 24

大师的精话，胜读十年书

Answer 25

去你丫的，几年没见，皮痒了啊你.....

Answer 26

我的又出现内存溢出了，怎么才能用之前都已经开启的线程呢？？而不是开启新线程呢？？又有点迷茫了。

Answer 27

线程是不能无限去new的，我感觉是因为线程创建太多了导致的。
看你最后两行，504个线程了，这种情况下，不出现内存溢出就奇怪了。不管怎么调整设置，最后必挂无疑。
用线程池。