Linked by Thom Holwerda on Tue 23rd Jan 2007 18:58 UTC, submitted by anonymous
Java IBM has released an SDK for Java 6. Product binaries are available for Linux on x86 and 64-bit AMD, and AIX for PPC for 32- and 64-bits. In addition to supporting the Java SE 6 Platform specification, the new SDK also focuses on, Data sharing between Java Virtual Machines, Enhanced diagnostics information, Operating system stack backtraces, Updated jdmpview tool, platform stability, and performance.
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Have a look at this paper I've wrote comparing the Sun vs IBM JVM GC. It turns out that memory performance depends mostly on the application and not so much on the VM.

And Sun's JVM has a big advantage over IBM, at least on Solaris: DTrace providers

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