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From kannan chandrasekaran <>
Subject Re: Heap Settings suggestions
Date Fri, 08 Oct 2010 01:03:37 GMT
Good point..

Thanks to both of you for the replies.

From: Matthew Dennis <>
Sent: Thu, October 7, 2010 4:59:28 PM
Subject: Re: Heap Settings suggestions

Keep in mind that .7 and on will have per-CF settings for most things so there 
will be even more control over the the tuning...
On Oct 7, 2010 3:10 PM, "Peter Schuller" <> wrote:
>> What if there is more than one keyspace in the system ? Assuming each
>> keyspace has the same number of column families, Can I linearly scale the
>> above recommendation to the number of keyspaces in the system .ie, if the
>> "X" is the heap size for a single keyspace and there are "Y" keyspaces, Is
>> it recommended to allocate "XY" as the max  Heap size ?  Please let me know.
> Yes. Each column family will have a memtable subject to the configured
> memory constraints; whether or not they are in different keyspaces
> does not matter.
> -- 
> / Peter Schuller

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