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This article introduces the relevant knowledge of "what is the cause of JVM memory leak". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

One of the phenomena of 1 OOM

The first kind of Java heap space is introduced today.

2 what is the cause?

1) the application tries to add more data to the heap space, but there is not enough space for it. When JVM reaches the heap size limit, it will cause a Java heap space error.

2) the amount of data is increasing rapidly. When the number of users or the amount of data suddenly reaches a peak and exceeds the expected threshold, operations that are running normally before the peak will stop running and trigger java.lang.OutOfMemoryError: Java heap space.

3) memory leak. Bad programming code errors will cause your application to consume more memory. Each time, some objects are left in the Java heap space. Over time, the leaked object consumes all available Java heap space.

3 how to solve and avoid it?

1) allocate reasonable memory to JVM's heap.

2) however, in many cases, providing more Java heap space will not solve the problem. For example, if your application contains memory leaks, even adding more heaps will only delay the error. In addition, increasing the amount of Java heap space tends to increase the GC pause time, which affects application throughput or latency.

3) if you want to solve the fundamental problem of Java heap space rather than masking symptoms, you need to figure out which part of the code is responsible for allocating the most memory. In other words, you need to know which objects occupy most of the heap and find ways to optimize them.

All right, that's all for today. I'll see you tomorrow in the second round.

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