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  1. MariaDB Server
  2. MDEV-25281

Switch to use non-atomic (vs atomic) distributed counter to track page-access counter

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      • As part of MDEV-21212 we switched to use distributed counter (default to atomic) for tracking page access (n_page_get).
      • Originally the counter was non-atomic and so represented an approximate value of the page access. Using the same analogy we could continue to use a non-atomic distributed counter that helps get an approximate count.
      • this change helps improve performance slightly in the range of 3-8% especially in more contention cases.

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          Bug - A problem which impairs or prevents the functions of the product. MDEV-21212 buf_page_get_gen -> buf_pool->stat.n_page_gets++ is a cpu waste (0.5-1%)

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

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              marko Marko Mäkelä
              krunalbauskar Krunal Bauskar
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