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Logical decoding's reorderbuffer.c may spill transaction files to disk when transactions are large. These are supposed to be removed when they become "too old" by xid; but file removal requires the boundary LSNs of the transaction to be known. The final_lsn is only set when we see the commit or abort record for the transaction, but nothing sets the value for transactions that crash, so the removal code misbehaves -- in assertion-enabled builds, it crashes by a failed assertion. To fix, modify the final_lsn of transactions that don't have a value set, to the LSN of the very latest change in the transaction. This causes the spilled files to be removed appropriately. Author: Atsushi Torikoshi Reviewed-by: Kyotaro HORIGUCHI, Craig Ringer, Masahiko Sawada Discussion: https://postgr.es/m/54e4e488-186b-a056-6628-50628e4e4ebc@lab.ntt.co.jp |
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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/.