I have similar questions:
So if we use dual 64-bit AMD Opterons with 16 GB RAM, will MySQL access
all 16 GB?
Has anyone found any point of diminishing returns on the amount of
memory in a server?
Which is better: fewer servers with more memory, or more servers with
less memory?
Marco Wertejuk wrote:
>Hey,
>
>| What is the limitation of a 32-bit architecture as it
>| relates to RAM and MySQL Cluster?
>
>I actually don't know about how mysql cluster is programmed
>according to memory usage, but I can tell you that no
>application can use more than 4GB memory on 32bit x86
>servers. Redhat enterprise supports more that 4GB using
>high address memory and em64t technology, but due to
>how memory configurations above the 32bit address limitations
>are supported no application can use more than 4GB.
>
>Of course you can run 2 4GB memory consuming applications
>on you 8GB server but this might not work with mysql cluster.
>
>You should probably consider using a 4 node cluster where
>you have 2 groups with each 2 nodes for redundancy and
>splitting the dataset across two servers.
>
>I think this will be easier for you at the cost of
>more hardware and probably more point of failures.
>
>
>
