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Noah Misch cd5e82256d Change XID and mxact limits to warn at 40M and stop at 3M. 
We have edge-case bugs when assigning values in the last few dozen pages
before the wrap limit.  We may introduce similar bugs in the future.  At
default BLCKSZ, this makes such bugs unreachable outside of single-user
mode.  Also, when VACUUM began to consume mxacts, multiStopLimit did not
change to compensate.

pg_upgrade may fail on a cluster that was already printing "must be
vacuumed" warnings.  Follow the warning's instructions to clear the
warning, then run pg_upgrade again.  One can still, peacefully consume
98% of XIDs or mxacts, so DBAs need not change routine VACUUM settings.

Discussion: https://postgr.es/m/20200621083513.GA3074645@rfd.leadboat.com
2020-08-01 15:31:01 -07:00
config Rename configure.in to configure.ac 2020-07-24 10:42:08 +02:00
contrib Invent "amadjustmembers" AM method for validating opclass members. 2020-08-01 17:12:47 -04:00
doc Change XID and mxact limits to warn at 40M and stop at 3M. 2020-08-01 15:31:01 -07:00
src Change XID and mxact limits to warn at 40M and stop at 3M. 2020-08-01 15:31:01 -07:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
.gitattributes gitattributes: Add new file 2019-11-12 08:13:55 +01:00
.gitignore Support for optimizing and emitting code in LLVM JIT provider. 2018-03-22 11:05:22 -07:00
aclocal.m4 Fix configure's AC_CHECK_DECLS tests to work correctly with clang. 2018-11-19 12:01:47 -05:00
configure Define OPENSSL_API_COMPAT 2020-07-19 12:14:42 +02:00
configure.ac Rename configure.in to configure.ac 2020-07-24 10:42:08 +02:00
COPYRIGHT Update copyrights for 2020 2020-01-01 12:21:45 -05:00
GNUmakefile.in Make install-tests target work with vpath builds 2020-05-31 18:33:00 -04:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Don't unset MAKEFLAGS in non-GNU Makefile. 2019-06-25 09:36:21 +12:00
README Canonicalize some URLs 2020-02-10 20:47:50 +01:00
README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00

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/.