4287c50fc2
Previously, pg_promote() looped a fixed number of times, calculated from the specified timeout, and waited 100ms on a latch, once per iteration, for the promotion of a standby to complete. However, unrelated signals to the backend could set the latch and wake up the backend early, resulting in a faster consumption of the loops and an execution time of the function that does not match with the timeout input given in input. This could be confusing for the function caller, especially if some backend-side timeout is aggressive, because the function would return much earlier than expected and report that the promote request has not completed within the time requested. This commit refines the logic to track the time actually elapsed, by looping until the requested duration has truly passed. The code calculates the end time we expect, then uses it when looping. Author: Robert Pang <robertpang@google.com> Reviewed-by: Tiancheng Ge <getiancheng_2012@163.com> Discussion: https://postgr.es/m/CAJhEC07OK8J7tLUbyiccnuOXRE7UKxBNqD2-pLfeFXa=tBoWtw@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/.