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cf26a8d8a7
It turns out that the instability complained of in commit d3c09b9b1 has an embarrassingly simple explanation. The test script waits for the standby to flush incoming WAL to disk, but it should wait for the WAL to be replayed, since we are testing for the effects of that to be visible. While at it, use wait_for_catchup instead of reinventing that logic, and adjust $Test::Builder::Level to improve future error reports. Back-patch to v12 where the necessary infrastructure came in (cf. aforesaid commit). Also back-patch 7d1aa6bf1 so that the test will actually get run. Discussion: https://postgr.es/m/2854602.1632852664@sss.pgh.pa.us
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.