How much is that actually necessary these days? I remember spending ages tweaking flags in the 1.4 - 1.6 years. But there have increasingly been sensible defaults with broad applicability. Now that G1 is both default and usable, even more so.

As i've moved onto 11, i've slashed our apps' JAVA_OPTS down to almost nothing - max heap size, some GC logging flags, that's it.