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1083f94dac
During dumptuples() the call to writetuple() would pfree any non-null tuple. This was quite wasteful as this happens just before we perform a reset of the context which stores all of those tuples. It seems to make sense to do a bit of a code refactor to make this work, so here we just get rid of the writetuple function and adjust the WRITETUP macro to call the state's writetup function. The WRITETUP usage in mergeonerun() always has state->slabAllocatorUsed == true, so writetuple() would never free the tuple or do any memory accounting. The only call path that needs memory accounting done is in dumptuples(), so let's just do it manually there. In passing, let's get rid of the state->memtupcount-- code that counts the memtupcount down to 0 one tuple at a time inside the loop. That seems to be a rather inefficient way to set memtupcount to 0, so let's just zero it after the loop instead. Author: David Rowley Discussion: https://postgr.es/m/CAApHDvqZXoDCyrfCzZJR0-xH+7_q+GgitcQiYXUjRani7h4j8Q@mail.gmail.com |
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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/.