mirror of
https://github.com/postgres/postgres.git
synced 2025-06-02 00:01:40 -04:00
70ec2f8f43
Clarify the docs explaining what commit_delay does, and add a recommendation about a useful value for it, namely half of the single-page fsync time reported by pg_test_fsync. This is informed by testing of the new-in-9.3 implementation of commit_delay; in prior versions it was far harder to arrive at a useful setting. In passing, do some wordsmithing and markup-fixing in the same general area. Also, change pg_test_fsync's default time-per-test from 2 seconds to 5. The old value was about the minimum at which the results could be taken seriously at all, and so seems a tad optimistic as a default. Peter Geoghegan, reviewed by Noah Misch; some additional editing by me
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 "gmake all" and "gmake
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.