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This is required as it is no safer for two related processes to perform clean up in gin indexes at a time than for unrelated processes to do the same. After acquiring page locks, we can acquire relation extension lock but reverse never happens which means these will also not participate in deadlock. So, avoid checking wait edges from this lock. Currently, the parallel mode is strictly read-only, but after this patch we have the infrastructure to allow parallel inserts and parallel copy. Author: Dilip Kumar, Amit Kapila Reviewed-by: Amit Kapila, Kuntal Ghosh and Sawada Masahiko Discussion: https://postgr.es/m/CAD21AoCmT3cFQUN4aVvzy5chw7DuzXrJCbrjTU05B+Ss=Gn1LA@mail.gmail.com |
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