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  1. MariaDB Server
  2. MDEV-22794

Avoid potential rollback segment contention with increased scalability through even distribution

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      Description

      • Currently when the rollback segment is allocated to the new booting transaction next slot/rollback-segment is allocated using a static rseg_slot counter.
      • Neither is this logic mutex protected nor is the counter atomic.
      • With increase scalability, it could potentially cause the same rollback segments to get allocated to multiple transactions when as per design allocation of rollback segment should be round-robin.
      • Fix proposes to use atomic for rseg_slot.

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            Assignee:
            marko Marko Mäkelä
            Reporter:
            krunalbauskar Krunal Bauskar
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