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In commit 33e05f89c5, we have added the option to display WAL usage statistics in Explain and auto_explain. The display format used two spaces between each field which is inconsistent with Buffer usage statistics which is using one space between each field. Change the format to make WAL usage statistics consistent with Buffer usage statistics. This commit also changed the usage of "full page writes" to "full page images" for WAL usage statistics to make it consistent with other parts of code and docs. Author: Julien Rouhaud, Amit Kapila Reviewed-by: Justin Pryzby, Kyotaro Horiguchi and Amit Kapila Discussion: https://postgr.es/m/CAB-hujrP8ZfUkvL5OYETipQwA=e3n7oqHFU=4ZLxWS_Cza3kQQ@mail.gmail.com
The PostgreSQL contrib tree
---------------------------
This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree. This does not preclude their
usefulness.
User documentation for each module appears in the main SGML
documentation.
When building from the source distribution, these modules are not
built automatically, unless you build the "world" target. You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.
Some directories supply new user-defined functions, operators, or
types. To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command. In a fresh database,
you can simply do
CREATE EXTENSION module_name;
See the PostgreSQL documentation for more information about this
procedure.