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The "DROP ACCESS METHOD gist2" test will require locking the index to be dropped and then its table; while most ordinary operations lock a table first then its index. While no concurrent test scripts should be touching fast_emp4000, autovacuum might chance to be processing that table when the DROP runs, resulting in a deadlock failure. This is pretty rare but we see it in the buildfarm from time to time. To fix, acquire a lock on fast_emp4000 before issuing the DROP. Since the point of the exercise is mostly to prevent buildfarm failures, back-patch to 9.6 where this test was introduced. Discussion: https://postgr.es/m/839004.1599185607@sss.pgh.pa.us |
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README.git |
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/.