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c28bfb35ef
The array allocated by GetRunningTransactionLocks() needs to be pfree'd when we're done with it. Otherwise we leak some memory during each checkpoint, if wal_level = hot_standby. This manifests as memory bloat in the checkpointer process, or in bgwriter in versions before we made the checkpointer separate. Reported and fixed by Naoya Anzai. Back-patch to 9.0 where the issue was introduced. In passing, improve comments for GetRunningTransactionLocks(), and add an Assert that we didn't overrun the palloc'd array. |
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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: http://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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.