b75f467b6e
Pass the buffer size as argument to LogicalTapeRewindForRead, rather than setting it earlier with the separate LogicTapeAssignReadBufferSize call. This way, the buffer size is set closer to where it's actually used, which makes the code easier to understand. This makes the calculation for how much memory to use for the buffers less precise. We now use the same amount of memory for every tape, rounded down to the nearest BLCKSZ boundary, instead of using one more block for some tapes, to get the total up to exact amount of memory available. That should be OK, merging isn't too sensitive to the exact amount of memory used. Reviewed by Peter Geoghegan Discussion: <0f607c4b-df23-353e-bf56-c0389d28495f@iki.fi>
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. 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/.