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  1. Core Server
  2. SERVER-15723

Avoid G_X lock for rename_collection within database

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Minor - P4 Minor - P4
    • 3.4.10, 3.5.10
    • Affects Version/s: 2.7.7
    • Component/s: Concurrency, Storage
    • None
    • Fully Compatible
    • ALL
    • v3.4
    • Storage 2017-07-31

      Probelm:

      See https://github.com/mongodb/mongo/blob/master/src/mongo/db/commands/rename_collection.cpp#L113

                  Lock::GlobalWrite globalWriteLock(txn->lockState());

      Solution:
      Scope this lock as a DB_X when renaming within a database. Renaming between databases probably still requires a G_X or perhaps two DB_X locks.

            Assignee:
            geert.bosch@mongodb.com Geert Bosch
            Reporter:
            alvin Alvin Richards (Inactive)
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              Created:
              Updated:
              Resolved: