Michael Paquier 34dfca2934 Change default value of default_toast_compression to "lz4", take two ... The default value for default_toast_compression was "pglz". The main reason for this choice is that this option is always available, pglz code being embedded in Postgres. However, it is known that LZ4 is more efficient than pglz: less CPU required, more compression on average. As of this commit, the default value of default_toast_compression becomes "lz4", if available. By switching to LZ4 as the default, users should see natural speedups on TOAST data reads and/or writes. Support for LZ4 in TOAST compression was added in Postgres v14, or 5 releases ago. This should be long enough to consider this feature as stable. While at it, quotes are removed from default_toast_compression in postgresql.conf.sample. Quotes are not required in this case. The in-place value replacement done by initdb if the build supports LZ4 would not use them in the postgresql.conf file added to a freshly-initialized cluster. Note that this is a version lighter than 7c1849311e, that included a replacement of --with-lz4 by --without-lz4 in configure builds, forcing a requirement for LZ4 in all environments. The buildfarm did not like it, at all. This commit switches default_toast_compression to lz4 as default only when --with-lz4 is defined, which should keep the buildfarm at bay while still allowing users to benefit from LZ4 compression in TOAST as long as the code is compiled with it. Author: Euler Taveira <euler@eulerto.com> Reviewed-by: Peter Eisentraut <peter@eisentraut.org> Reviewed-by: Aleksander Alekseev <aleksander@tigerdata.com> Discussion: https://posgr.es/m/435df33a-129e-4f0c-a803-f3935c5a5ecb@eisentraut.org		2026-03-05 09:24:35 +09:00
..
src	Change default value of default_toast_compression to "lz4", take two	2026-03-05 09:24:35 +09:00
KNOWN_BUGS	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
Makefile	Remove distprep	2023-11-06 15:18:04 +01:00
MISSING_FEATURES	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
TODO	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00