Virtual memory compression: Difference between revisions

Revision as of 07:17, 6 January 2015

Revision as of 07:21, 6 January 2015

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===Background I/O===

In order for virtual memory compression to provide anymeasurable performance improvementimprovements, the throughput of the virtual memory system must be improved vs.when compared to the uncompressed equivalent. Thus, the overheadadditional of the compression must be lower than the throughputamount of theprocessing paging systemintroduced withoutby the compression undermust thenot same load. This can be difficult to achieve given that in most instances much ofincrease the pagingoverall I/O happens as a background process, which allows other processes to continuelatency. However, in I/O -bound systems or applications, with highly compressible data sets, the gains can be impressivesubstantial.

===Increased thrashing===