Methods and mechanisms for proactive memory management
First Claim
1. A computer-readable storage device having stored thereon a data structure, comprising:
- a standby page set for logically storing a plurality of pages of memory that have been identified as candidates for being paged out from system memory to durable storage due to memory pressure; and
a plurality of subsets in the standby page set, each subset being associated with a different priority value, each subset containing one or more of the pages having the priority value that is associated with the subset,wherein the standby page set is rebalanced to move pages between the subsets based on measured usage information for the pages.
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Accused Products
Abstract
A proactive, resilient and self-tuning memory management system and method that result in actual and perceived performance improvements in memory management, by loading and maintaining data that is likely to be needed into memory, before the data is actually needed. The system includes mechanisms directed towards historical memory usage monitoring, memory usage analysis, refreshing memory with highly-valued (e.g., highly utilized) pages, I/O pre-fetching efficiency, and aggressive disk management. Based on the memory usage information, pages are prioritized with relative values, and mechanisms work to pre-fetch and/or maintain the more valuable pages in memory. Pages are pre-fetched and maintained in a prioritized standby page set that includes a number of subsets, by which more valuable pages remain in memory over less valuable pages. Valuable data that is paged out may be automatically brought back, in a resilient manner. Benefits include significantly reducing or even eliminating disk I/O due to memory page faults.
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Citations
20 Claims
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1. A computer-readable storage device having stored thereon a data structure, comprising:
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a standby page set for logically storing a plurality of pages of memory that have been identified as candidates for being paged out from system memory to durable storage due to memory pressure; and a plurality of subsets in the standby page set, each subset being associated with a different priority value, each subset containing one or more of the pages having the priority value that is associated with the subset, wherein the standby page set is rebalanced to move pages between the subsets based on measured usage information for the pages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A computer-readable storage device having stored thereon a data structure, comprising:
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a standby page set for logically storing pages of memory; a plurality of subsets in the standby page set, each subset corresponding to a value associated with the pages therein; and wherein the standby page set is rebalanced to move pages between the subsets based on measured usage information for the pages, and wherein the standby page set includes a plurality of frequency-based subsets in the standby page set, the standby page set rebalanced to move pages between the frequency-based subsets based on time data. - View Dependent Claims (14, 15, 16, 17)
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18. A computer-readable storage device having stored thereon a data structure, comprising:
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a standby page set for logically storing pages of memory; a plurality of subsets in the standby page set, each subset corresponding to a value associated with the pages therein; and wherein the standby page set is rebalanced to move pages between the subsets based on measured usage information for the pages, and wherein the standby page set includes a plurality of time-of-last-usage-based subsets in the standby page set, the standby page set rebalanced to move pages between the time-of-last-usage-based subsets based on time data. - View Dependent Claims (19, 20)
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Specification