Sunday, November 28, 2010

Memory Compression

Memory Compression was introduced in vSphere 4.1. Utilization of compression falls between Ballooning & VMkernel Swap. Pages which would have been swapped out are instead compressed & stored in a compression cache (10% of VM memory) located in the main memory. Access to the page only causes a page decompression which can be an order of magnitude faster than the disk access. This is cool technology!

http://bit.ly/dvGHsp
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