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Previously the timer was enabled whenever there were any pending stats after executing a statement, just to then be disabled again when not idle anymore. That lead to an increase in GetCurrentTimestamp() calls from within timeout.c compared to 14. To avoid that increase, leave the timer enabled until stats are reported, rather than until idle. The timer is only disabled once the pending stats have been reported. For me this fixes the increase in GetCurrentTimestamp() calls, there now are fewer calls in 15 than in 14, in the previously slowed down workload. While at it, also update assertion in pgstat_report_stat() to be more precise. Author: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/20220616233130.rparivafipt6doj3@alap3.anarazel.de Backpatch: 15- |
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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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.