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Tomas Vondra f2369bc610 Use Size instead of int64 to track allocated memory Commit `5dd7fc1519` added block-level memory accounting, but used int64 variable to track the amount of allocated memory. That is incorrect, because we have Size for exactly these purposes, but it was mostly harmless until `c477f3e449` which changed how we handle with repalloc() when downsizing the chunk. Previously we've ignored these cases and just kept using the original chunk, but now we need to update the accounting, and the code was doing this: context->mem_allocated += blksize - oldblksize; Both blksize and oldblksize are Size (so unsigned) which means the subtraction underflows, producing a very high positive value. On 64-bit platforms (where Size has the same size as mem_alllocated) this happens to work because the result wraps to the right value, but on (some) 32-bit platforms this fails. This fixes two things - it changes mem_allocated (and related variables) to Size, and it splits the update to two separate steps, to prevent any underflows. Discussion: https://www.postgresql.org/message-id/15151.1570163761%40sss.pgh.pa.us		2019-10-04 16:10:56 +02:00
config	Remove obsolete reference to Irix	2019-08-18 06:53:28 +02:00
contrib	Allow definition of lock mode for custom reloptions	2019-09-25 10:13:52 +09:00
doc	pgbench: add --partitions and --partition-method options.	2019-10-03 08:27:07 +05:30
src	Use Size instead of int64 to track allocated memory	2019-10-04 16:10:56 +02:00
.dir-locals.el	Make Emacs perl-mode indent more like perltidy.	2019-01-13 11:32:31 -08:00
.gitattributes	Add XSL stylesheet to fix up SVG files	2019-06-19 21:26:42 +02:00
.gitignore	Support for optimizing and emitting code in LLVM JIT provider.	2018-03-22 11:05:22 -07:00
COPYRIGHT	Update copyright for 2019	2019-01-02 12:44:25 -05:00
GNUmakefile.in	Add "headerscheck" script to test header-file compilability under C.	2019-08-19 14:22:56 -04:00
HISTORY	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00
Makefile	Don't unset MAKEFLAGS in non-GNU Makefile.	2019-06-25 09:36:21 +12:00
README	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00
README.git	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00
aclocal.m4	Fix configure's AC_CHECK_DECLS tests to work correctly with clang.	2018-11-19 12:01:47 -05:00
configure	Revert "For all ppc compilers, implement pg_atomic_fetch_add_ with inline asm."	2019-09-14 19:38:41 -07:00
configure.in	Revert "For all ppc compilers, implement pg_atomic_fetch_add_ with inline asm."	2019-09-14 19:38:41 -07:00

README

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/.