java memory leak tool

inside the localVariable.remove() 5 thread of the threadlocals variable inside the new LocalVariable() instance is not released, although the thread pool inside the task is completed, but the thread pool inside the 5 threads will persist until the JVM exits. It is important to note that because Localvariable is declared static, localvariable is not recycled, although the threadlocalmap inside the thread is a weak reference to localvariable. The code that runs the result two does not have a

Developed in Java, string is the type that our development program can say must be used, string has a substring method to intercept the string, which we must also use often. But you know, about whether substring in Java 6 will cause a memory leak, there are some discussions in foreign forums and communities so that

This article comes from a hot discussion on the StackOverflow question and answer website: How to write a piece of code in Java that will cause a memory leak.Q: I was in the interview just now, and the interviewer asked me how to write out the Java code that would be leaking memory. I have no idea of this problem, it's

One, the problem arisesProject AdoptionTomcat6.0 for server, the database ismysql5.1, the database persistence layer ishibernate3.0, tospringMVC3.0 for Frames, after the completion of project development, on the eve of the stability of the machine, the test data is inserted4 article/S, update4 article/S, Access300 plays/S, smooth running speed, and it starts running slowly after three days., the number of visits reached1500W Times to throwJava Heap Space Ends.Two 1. Pre-analysis for connection

we do not need, not in use of goods, these items crowding out the space we need,And let's have the idea of discarding it to free up more space.There are two very important benchmarks in this understanding of rubbish, one is the object and the other is space.1. Heap Memory:In Java, the object corresponds to "objects", and space is "Java Heap memory" (created at J

For a long time, Android developed, found that Android application development is easy to start, but advanced or become a senior engineer, the need to have the basic ability is very high: performance optimization, memory leakage, apk slimming, heat repair and so on, these are very test a person's ability. Android has a long way to go, and it's going to keep going. This article mainly introduces the knowledge of the Android

First, the problem arisesThe project uses Tomcat6.0 as the server, the database is mysql5.1, the database persistence layer is hibernate3.0, takes the springMVC3.0 as the framework, after the project development completes, the line Eve carries on the stability to copy the machine, the test data is inserts 4 strips/s, updates 4 strips/s, Access 300 times/S, the pre-run speed is smooth, three days after the start of slow, traffic reached 1500W times to throw J