Hardware reality check

[dwmtractor]

Question for all you gearheads out there. I'm currently running my Zimbra on Ubuntu 6.06 LTS on an IBM x330 server with a single 1.4GHz processor. Due to some reconfiguration I have a spare server that happens to have dual 1.4GHz processors. I'm thinking of using it as an excuse to upgrade to Ubuntu 8.04 LTS, but I've got two more years of 6.06 support so I'm in no hurry for that alone.

My question is, does anybody know whether Zimbra takes advantage of multiple processors in any way that would give me an advantage going from a single-CPU to a double-CPU of otherwise identical configuration?

Thanks!

[uxbod]

I am sure Java will thread nicely across multiple cpus.

[xeon]

I don't know if Zimbra specifically does. But the Ubuntu Linux SMP kernel will take care of the CPU. You will have a performance boost. But if you are not topping out your current CPU then you probably will not see much performance boost.

[veronica]

Zimbra takes advantage of multi processor for garbage collection. It does parallelGC ( see option UseParallelGC in mailboxd_java_options ) incase of more than one processor.