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Can someone explain how setting 'sched.mem.pshare.enable=TRUE increases Disk I/O?
I have read this from an online article but don't fully understand it:
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Page sharing (quoted from VMware documentation)
VMware uses a page sharing technique to allow guest memory pages with identical contents to be stored as a single copy-on-write page. Page sharing decreases host memory usage, but consumes system resources, potentially including I/O bandwidth.
You may want to avoid this overhead for guests for which host memory is plentiful and I/O latency is important. To disable page sharing, add the following line to the virtual machine configuration (.vmx) file:
sched.mem.pshare.enable=FALSE option
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Many of my quest VMs have severe Disk I/O issues and I would like to disable this setting on all of them. Any implications I should be aware of? How much additional memory is needed to avoid a memory bottleneck?
Megan