Here is a useful guide on tuning Cassandra heap

TL;DR You wouldn't want to allocate more than 1/2 of physical memory to
heap so you wouldn't exceed 32 GB anyway.

On Mon, Feb 12, 2018 at 11:08 PM, Eunsu Kim <> wrote:

> current/heap-sizing.html#compressed_oops
> According to the article above, if the heap size of the JVM is about 32GB,
> it is a waste of memory because it can not use the compress object pointer.
> (Of course talking about ES)
> But if this is a general theory about the JVM, does that apply to
> Cassandra as well?
> I am using a 64 GB physical memory server and I am concerned about heap
> size allocation.
> Thank you.

Ben Wood
Software Engineer - Data Agility

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