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Disabling Memory Trimming and Page Sharing
choose: VM > Settings > Options > Advanced
Workstation uses a memory trimming technique to return unused virtual machine memory to the host machine for other uses. While trimming usually has little impact on performance and might be needed in low-memory situations, the I/O caused by memory trimming can sometimes interfere with disk-oriented workload performance in a guest. To disable memory trimming, select Disable memory page trimming.
Workstation 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 some 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, see chapter about performance tuning in the VMware Workstation User’s Manual.
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