diff --git a/docs/version0.15.md b/docs/version0.15.md index 0103d66ef3..e15ce05799 100644 --- a/docs/version0.15.md +++ b/docs/version0.15.md @@ -33,6 +33,7 @@ - ![Start of content that applies only to Java 11 (LTS)](cr/java11.png) [ChaCha20 algorithm support for OpenSSL](#chacha20-algorithm-support-for-openssl)![End of content that applies only to Java 11 (LTS)](cr/java_close_lts.png) - [Support for OpenJDK HotSpot options](#support-for-openjdk-hotspot-options) - [Support for Transparent HugePage](#support-for-transparent-hugepage) +- ![Start of content that applies to Java 11 (LTS) and later](cr/java11plus.png) [Support for low-overhead heap profiling (JEP 331)](#support-for-low-overhead-heap-profiling)![End of content that applies only to Java 11 (LTS)](cr/java_close_lts.png) - [Removal of -Xdiagnosticscollector option](#removal-of-xdiagnosticscollector-option) @@ -69,6 +70,16 @@ For compatibility, the [`-XX:OnOutOfMemoryError`](xxonoutofmemoryerror.md) OpenJ The VM now supports the allocation of huge pages on Linux when you use the `madvise` (`/sys/kernel/mm/transparent_hugepage/enabled`) setting. To enable this feature, set [`-XX:+TransparentHugePage`](xxtransparenthugepage.md) on the command line when you start your application. This option is currently not enabled by default. +### ![Start of content that applies to Java 11 (LTS) and later](cr/java11plus.png) Support for low-overhead heap profiling + +[JEP 331](http://openjdk.java.net/jeps/331) provides a mechanism for sampling Java heap allocations with a low overhead via +the JVM Tool Interface (JVMTI). + + **Restrictions:** JEP 331 is implemented for OpenJ9 with the following limitations: + +- The `balanced` and `metronome` garbage collection policies are not supported. +- The changes might not be compatible with the Health Center agent, which uses the same sampling interval. + ### Removal of -Xdiagnosticscollector option This option was redundant and has now been removed. If you try to use this option on the command line, the VM outputs this error message: