Thrashing¶
Denning, P. J. (1968). Thrashing: Its causes and prevention. Proceedings of the AFIPS Fall Joint Computer Conference, 915-922.
Cited by¶
2 citations across 2 artifacts.
Each citation links to the sentence it supports in the citing article.
Primes¶
- Caching
- T3: Working Set Larger Than Cache. When the working set exceeds cache capacity, hit rates drop precipitously (cliff behavior), and performance may be worse than with no cache (overhead without benefit)
This sourceShows that when the combined working sets exceed available fast storage the system thrashes — hit rate collapses and performance falls toward the slow tier — the working-set-larger-than-cache cliff behavior. Re-sources marker 029 (replaces a non-supporting, mis-dated Agarwal Alewife citation).
- T3: Working Set Larger Than Cache. When the working set exceeds cache capacity, hit rates drop precipitously (cliff behavior), and performance may be worse than with no cache (overhead without benefit)
Mechanisms¶
- Demand Paging
- Past that point the fault rate explodes into thrashing — the system spends more time servicing page faults than doing useful work, and throughput collapses far out of proportion to the memory shortfall.
This sourceDefines thrashing as explosive paging activity that consumes processing time and collapses useful throughput.
- Past that point the fault rate explodes into thrashing — the system spends more time servicing page faults than doing useful work, and throughput collapses far out of proportion to the memory shortfall.
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