What is meta space in Java?

Simply put, Metaspace is a new memory space – starting from the Java 8 version; it has replaced the older PermGen memory space. The most significant difference is how it handles memory allocation. Specifically, this native memory region grows automatically by default.

How do I fix Java Lang OutOfMemoryError Metaspace?

OutOfMemoryError: Metaspace error is thrown. To mitigate the issue, you can increase the size of the Metaspace by adding the -XX:MaxMetaspaceSize flag to startup parameters of your Java application. For example, to set the Metaspace region size to 128M, you would add the following parameter: -XX:MaxMetaspaceSize=128m .

Why does Java 8 remove PermGen space?

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.

Should I set MaxMetaspaceSize?

MaxMetaspaceSize is by default unlimited, so there is no need to change in most cases to another value. At this time, there are no other recommendations.

What is PermGen and Metaspace?

In Java 8, PermGen method area replaced with MetaSpace. They have moved permGem to the separate memory in the native OS and that is called MetaSpace. It can by default auto increases its size. In MetaSpace, classes can load and unload during the lifespan of the JVM.

What is Java Lang OutOfMemoryError Metaspace?

The java. lang. OutOfMemoryError: Metaspace indicates that the amount of native memory allocated for Java class metadata is exausted. Let’s how this issue can be solved in standalone applications and cloud applications.

What is Metaspace size in JVM?

Metaspace is introduced in Java 8 and default size of it is unlimited(limited to physical memory) with dynamic growth.

Why do we need garbage collection in Java?

Java applications obtain objects in memory as needed. It is the task of garbage collection (GC) in the Java virtual machine (JVM) to automatically determine what memory is no longer being used by a Java application and to recycle this memory for other uses.

What is the difference between PermGen and heap?

PermGen is an abbreviation for Permanent Generation and it’s a special heap space which is separate from the main Java heap where JVM keeps track of metadata of the classes which have been loaded….

JVM Default maximum PermGen size (MB) Default maximum Metaspace size
64-bit JVM 82 unlimited

What is Java MaxMetaspaceSize?

The -XX:MaxMetaspaceSize applies to the sum of the committed compressed class space and the space for the other class metadata. Class metadata is deallocated when the corresponding Java class is unloaded.