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  1. MariaDB Server
  2. MDEV-26552

MyISAM index corruption on 400M rows

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Not a Bug
    • Affects Version/s: 10.5.11, 10.5.12
    • Fix Version/s: N/A
    • Component/s: N/A
    • Labels:
    • Environment:
      debian unstable

      Description

      Hi

      I have table corruption caught by check table.

      I narrowed my ~400M rows table to a single integer column. The error happens after index creation if you run check table.

      I managed to recreate it with a random set of 70K values distributed in 400M rows.

      See the attached script. It completes in 32' in my system (oldish xeon with NVM) and it fails
      with

      --------------
      CHECK TABLE bugtable
      --------------
       
      +---------------+-------+-------+------------------------------------------+
      | budb.bugtable | check | error | Key in wrong position at page 1023494144 |
      | budb.bugtable | check | error | Corrupt                                  |
      +---------------+-------+-------+------------------------------------------+
      2 rows in set (38.701 sec)
      
      

      The script is easily run with:

      time ./mysql-index-corruption-bug.sh bugdb bugtable;
      

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              Assignee:
              Unassigned Unassigned
              Reporter:
              vasvir Vassilis Virvilis
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                Dates

                Created:
                Updated:
                Resolved:

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