The functions test_stat_func() and test_stat_func2() had empty function bodies, so that they took very little time to run. This made it possible that on machines with relatively low timer resolution the functions could return before the clock advanced, making the test fail (as seen on buildfarm members fruitcrow and hamerkop). To avoid that, pg_sleep for 10us during the functions. As far as we can tell, all current hardware has clock resolution much less than that. (The current implementation of pg_sleep will round it up to 1ms anyway, but someday that might get improved.) Author: Michael Banck <mbanck@gmx.net> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/68d413a3.a70a0220.24c74c.8be9@mx.google.com Backpatch-through: 15
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/.