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  1. WiredTiger
  2. WT-4957

Revert part of a change about when pages are queued for urgent eviction

    • v4.2, v4.0, v3.6

      We noticed a performance regression when a change was made to stop the eviction server evicting pages itself.

      With WT-4898, the page eviction is postponed to the eviction threads based on the following additional checks.

      • Threads that are not configured for slow operations
      • if WT_READ_NO_EVICT is set

      With the above additional checks addition in __wt_page_release function, it leads some regression in sys-perf tests. 

       

      SUMMARY: While stopping the eviction server to evict the pages itself, it missed to add those pages tot the eviction queues, that leads to a performance regression. This fix ensures that all the pages are added to urgent queue by the eviction server.

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        3. with-4898-eviction-threads-bottleneck-spinlock.png
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        4. with-4898-eviction-threads-bottleneck-spinlock-2.png
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        5. with-4898-eviction-flow-1.png
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        6. with-4898-eviction-flow-2.png
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            Assignee:
            haribabu.kommi@mongodb.com Haribabu Kommi
            Reporter:
            haribabu.kommi@mongodb.com Haribabu Kommi
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              Created:
              Updated:
              Resolved: