postgres

Tom Lane 0a0727ccfc Improve performance of binary COPY FROM through better buffering. At least on Linux and macOS, fread() turns out to have far higher per-call overhead than one could wish. Reading 64KB of data at a time and then parceling it out with our own memcpy logic makes binary COPY from a file significantly faster --- around 30% in simple testing for cases with narrow text columns (on Linux ... even more on macOS). In binary COPY from frontend, there's no per-call fread(), and this patch introduces an extra layer of memcpy'ing, but it still manages to eke out a small win. Apparently, the control-logic overhead in CopyGetData() is enough to be worth avoiding for small fetches. Bharath Rupireddy and Amit Langote, reviewed by Vignesh C, cosmetic tweaks by me Discussion: https://postgr.es/m/CALj2ACU5Bz06HWLwqSzNMN=Gupoj6Rcn_QVC+k070V4em9wu=A@mail.gmail.com		6 years ago
config	Rename configure.in to configure.ac	6 years ago
contrib	Fix ancient violation of zlib's API spec.	6 years ago
doc	doc: Document that ssl_ciphers does not affect TLS 1.3	6 years ago
src	Improve performance of binary COPY FROM through better buffering.	6 years ago
.dir-locals.el	…
.editorconfig	…
.gitattributes	…
.gitignore	…
COPYRIGHT	…
GNUmakefile.in	Make install-tests target work with vpath builds	6 years ago
HISTORY	…
Makefile	…
README	…
README.git	…
aclocal.m4	…
configure	Define OPENSSL_API_COMPAT	6 years ago
configure.ac	Rename configure.in to configure.ac	6 years ago

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/.