VisualVM 1.1.1 Released
By Jiri Sedlacek-Oracle on Feb 17, 2009
VisualVM 1.1.1 tool has been released at https://visualvm.dev.java.net. This version delivers several important bugfixes and improves memory monitoring capabilities.
The most significant news are two plugins available on VisualVM 1.1.1 Plugin Center:
- Memory Sampler plugin: this plugin periodically polls the monitored application and lists classes, instances and live bytes allocated on Heap and PermGen. This is almost the same information as provided by live memory results of the built-in profiler but without any instrumentation and available for multiple applications at the same time. An advantage over the built-in profiler is the possibility to display delta values between the samples. Note that this plugin only works with local Java applications running Sun JDK 6 or 7.
- Improved Visual GC plugin: the Visual GC tool integration into VisualVM has been improved, the graphs are now displayed in a subtab for each monitored application. It works for both local and remote applications where jvmstat is available (jstatd must be running on remote hosts). Note that this plugin works only with Sun JDK 1.4.2 and newer.
The most important bugfixes are:
- Issue 233: fixed compatibility problems with JDK 6 Update 12, VisualVM now works correctly with this JDK even without the VisualVM-Extensions plugin.
- Issue 242: CPU utilization chart in Monitor tab introduced in VisualVM 1.1 has been fixed to display correct values on multiprocessor systems.
To get more information about the tool, download it and start using it, visit the project pages at https://visualvm.dev.java.net. If you want to provide some feedback to VisualVM developers, let them know on a mailing list.