Friday, February 25, 2011

JDK1.6.0_24 released

Nothing interesting though.... JDK1.6.0_23 included the latest version of VisualVM but this is old news by now.

First impressions from G1GC

I was trying to see how G1GC will cope with an application that I am investigating.
Here are my disappointing results:
1. With JDK 1.6.0_20 G1GC is not reporting memory correctly via JMX. problem is solved in later jdks but I am not able at this stage to upgrade the JVM
2. VisualVM is not reporting memory correctly with G1GC need to open a bug for this issue.
3. I cannot find thorough documentation regarding what the GC logs mean (when using G1GC with -Xloggc)
4. The application crashed every few minutes. Again this was with  160_20 and I need to recheck with 160_24