How do I fix Java Lang OutOfMemoryError PermGen space?
To fix it, increase the PermGen memory settings by using the following Java VM options. -XX:PermSize – Set initial PermGen Size. -XX:MaxPermSize – Set the maximum PermGen Size. In the next step, we will show you how to set the VM options in Tomcat, under Windows and Linux environment.
What is Java PermGen?
PermGen stands for Permanent Generation. It is a special type of heap space. It is separate from the main memory (heap). JVM uses PermGen to keep track of loaded class metadata.
What causes Java heap space error?
Usually, this error is thrown when there is insufficient space to allocate an object in the Java heap. In this case, The garbage collector cannot make space available to accommodate a new object, and the heap cannot be expanded further.
Is PermGen part of heap?
PermGen (Permanent Generation) is a special heap space separated from the main memory heap. The JVM keeps track of loaded class metadata in the PermGen. Additionally, the JVM stores all the static content in this memory section.
How do you deal with Outofmemory errors?
1) An easy way to solve OutOfMemoryError in java is to increase the maximum heap size by using JVM options “-Xmx512M”, this will immediately solve your OutOfMemoryError.
Is PermGen removed in Java 8?
In JDK 8.0 the Permanent Generation (PermGen) space has completely been removed and is kind of replaced by a new space called Metaspace. The consequences of the PermGen removal is that obviously the PermSize and MaxPermSize JVM arguments are ignored and you will never get a java.
Why is PermGen removed from Java 8?
The main reason for removing PermGen in Java 8 is: It is very hard to predict the required size of PermGen. It is fixed size at startup, so difficult to tune. Future improvements were limited by PermGen space.
How to fix Java OutOfMemoryError permgen space error?
The java.lang.OutOfMemoryError: PermGen space error in Java occurs when the PermGen area of the heap is exhausted. As such, the application needs more space to load the classes into the PermGen area. Therefore, to fix this error, the maximum size of the PermGen area can be increased using the -XX:MaxPermSize JVM attribute.
What is permgen space in Java?
So – the java.lang.OutOfMemoryError: PermGen space message indicates that the Permanent Size area in memory is exhausted. This specific area called PemGen is a dedicated region where Java classes are loaded and stored. This consists of the following:
What is pemgen in Java?
This specific area called PemGen is a dedicated region where Java classes are loaded and stored. This consists of the following: That’s pretty much it. Some more bits and pieces, but it does not impact the actual memory consumption by more than few percent.
What is the main cause of PermGen error?
So it is easy to see the main cause for such error: either too many classes or too big classes are being loaded to the permanent generation. Quick fix for symptoms is easy – if we have exhausted the PermGen area in the heap, we need to increase its size. This solution is indeed helpful if just have not given your JVM enough elbow room.