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Currently, the replication origin tracking of the tablesync worker is dropped by the apply worker. So, there will be a small lag between the tablesync worker exit and its origin tracking got removed. In the meantime, new tablesync workers can be launched and will try to set up a new origin tracking. This can lead the system to reach max configured limit (max_replication_slots) even if the user has configured the max limit considering the number of tablesync workers required in the system. We decided not to back-patch as this can occur in very narrow circumstances and users have to option to increase the configured limit by increasing max_replication_slots. Reported-by: Hubert Depesz Lubaczewski Author: Ajin Cherian Reviwed-by: Masahiko Sawada, Peter Smith, Hou Zhijie, Amit Kapila Discussion: https://postgr.es/m/20220714115155.GA5439@depesz.com |
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