Compression memory question

Hello

I wonder how the new feature of vSphere 4.1 "memory compression.

I understand that this is the third (after 'the transparent memory page sharing' and 'hot air balloon') option when on memory allocation.

Balloon flight memory can take 0-75% (65% by default) of a unreserverd of VMs memory which means this memory compression will give out the rest of the VMs without reserve (default 35%) memory.

How the ESXi/ESX Server determine what memory and the amount of memory it can compress before using the last resort, exchange the disk?

Compressed memory is put in the area of maximum compression cache, but where is this located cache size, it is a part of the area of memory used by VMkernel to manage the virtual computer?

Thank you

Magnus Andersson

You forgot an official http://www.vmware.com/files/pdf/techpaper/vsp_41_perf_memory_mgmt.pdf

Tags: VMware

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