c210647aeb
When a subscription has retain_dead_tuples enabled and maxretention is zero (unlimited), adjust_xid_advance_interval() mistakenly caps xid_advance_interval to zero. This zero interval forces get_candidate_xid() to evaluate TimestampDifferenceExceeds() as always true, causing the apply worker to call GetOldestActiveTransactionId() for every WAL message. This leads to unnecessary ProcArrayLock acquisitions. Fix this by only capping the interval when maxretention > 0, allowing the exponential back-off to function properly. Author: SATYANARAYANA NARLAPURAM <satyanarlapuram@gmail.com> Reviewed-by: shveta malik <shveta.malik@gmail.com> Reviewed-by: Nisha Moond <nisha.moond412@gmail.com> Discussion: https://postgr.es/m/CAHg+QDdKVnCLHot=AcoPpEiSyDzGz7wGYjAFHVOw57oDtmUDWQ@mail.gmail.com |
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PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.