24.08.1.0

Zing 24.08.1.0 includes a performance improvement in ReadyNow which improves the efficiency and reporting of the built-in class loader identification task.

In case you need to disable Extended Native Memory Tracking (NMT), Zing 24.08.1.0 includes new command line option UseExtendedNMT , which you can use to disable Zing’s Extended NMT, and EnableNMTIntegrityChecks , which you can use to disable checks on allocations. Zing runs in Extended NMT mode and includes integrity checks by default. Using -XX:-UseExtendedNMT tells Zing to run NMT in a Zulu-like mode. We do not recommend disabling Extended NMT except in very specific cases.

Zing 24.08.1.0 features an update to JVMTI behavior in order to bring it to the modern standard. Previously, a few commercial Java application performance monitoring tools have been reporting too long GC pause times because Zing was reporting non-pausing concurrent GC durations wrongly as GC pauses over JVMTI events JVMTI_EVENT_GARBAGE_COLLECTION_START (GarbageCollectionStart) and JVMTI_EVENT_GARBAGE_COLLECTION_FINISH (GarbageCollectionFinish).

The new correct reporting may increase the actual GC pauses slightly if monitoring software attached with -javaagent using JVMTI is active. By adding -XX:-GPGCNotifyJVMTIGCEventsInSafepoint the reporting of GC events can be moved outside the pause.

There are no new issues to report in this release.