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  1. WiredTiger
  2. WT-5527

Free the onpage updates when restoring update chains

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    • 8
    • Storage Engines 2020-04-06

    Description

      In WT-5522, we have made the decision to not free updates when we insert updates to history store due to possibility of failed reconciliation causing data loss and data mismatch. Instead, we should free the updates when we restore the update chains to the new disk image. At that time, reconciliation can no longer fail and we can safely free the onpage updates and the older updates as they have been written to the data file and the history store file.

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          causes

          Bug - A problem which impairs or prevents the functions of the product. WT-5952 Fix freeing updates racing with application threads

          • Major - P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. WT-5990 Null ptr dereference while taking checkpoint

          • Major - P3 - Major loss of function.
          • Closed
          is duplicated by

          Improvement - An improvement or enhancement to an existing feature or task. WT-5507 Free the selected update written to disk in the update chain and reconstruct forward modifies based on the onpage value

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. WT-5522 Remove update free logic in hs_insert_updates.

          • Major - P3 - Major loss of function.
          • Closed

          Build Failure - WT-5826 Fix a leak when a page splits and some updates aren't restored

          • Major - P3 - Major loss of function.
          • Closed

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              chenhao.qu@mongodb.com Chenhao Qu
              chenhao.qu@mongodb.com Chenhao Qu
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                Updated:
                Resolved: