Michael Paquier c14a9eeec4 Avoid instabilities with the regression tests of pg_freespacemap
It was possible to run those tests with installcheck, but they are
actually unstable as concurrent autovacuum jobs could prevent the
truncation of the filespace map to happen (aka the scan of pg_database
when building the list of relations to clean), an assumption we rely on
when checking that the FSM of the relation gets truncated during a
manual vacuum after deleting all the relation's data.

This commit adds a NO_INSTALLCHECK to disallow installcheck, and
introduces the use of a custom configuration file with autovacuum
disabled.

It happens that we already do that in the recovery test
008_fsm_truncation, for example.

Reported-by: Tom Lane, via buildfarm member skink
Discussion: https://postgr.es/m/381910.1648401526@sss.pgh.pa.us
2022-03-29 13:52:49 +09:00
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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.