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Subject Re: java.util.concurrent.TimeoutException: Operation timed out - received only 0 responses from .
Date Sat, 05 Dec 2009 17:42:35 GMT
i use a 64 bit machine and gave 6gigs ram
it runs on native fedora no vm

On Sun, Nov 29, 2009 at 4:22 AM, Mark Robson <> wrote:

> 2009/11/28 <>
>> thanks i dont have more than 1 node ie just one node operation
>> so dunno if the timeout increase will help
> Presumably this is a test system on a vmware; it may have insufficient
> memory.
> I'd say make sure that your test virtual machine (vmware etc) has at least
> 1.5G of ram allocated and the Java VM is tuned suitably. Don't run on a
> 32-bit system as this limits the size of the Java heap too small.
> I'm speculating here, but you didn't give us much to work on.
> A production Cassandra node should have at least 16G of ram as it's really
> cheap. Ram doesn't use much power and power is the main consideration for
> datacentres nowadays. A 64-bit system is necessary as otherwise you'll be
> limited to a <3G Java heap, which makes having 16G ram pointless.
> Mark

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