-Xclassgc / -Xnoclassgc
These options enable or disable the garbage collection (GC) of storage that is associated with Java classes that are no longer being used by the Eclipse OpenJ9™ VM.
When enabled, GC occurs only on class loader changes. To always enable dynamic class unloading regardless of class loader changes, set -Xalwaysclassgc.
Note: Disabling class GC is not recommended because unlimited native memory growth can occur, which can lead to out-of-memory errors.
Syntax
| Setting | Action | Default |
|---|---|---|
-Xclassgc |
Enables dynamic class unloading on demand | yes |
-Xnoclassgc |
Disables dynamic class unloading |
These options can be used with all OpenJ9 GC policies.