32.1. Running the Tests
The regression tests can be run against an already installed and running server, or using a temporary installation within the build tree. Furthermore, there is a “parallel” and a “sequential” mode for running the tests. The sequential method runs each test script alone, while the parallel method starts up multiple server processes to run groups of tests in parallel. Parallel testing adds confidence that interprocess communication and locking are working correctly.
32.1.1. Running the Tests Against a Temporary Installation
To run the parallel regression tests after building but before installation, type:
in the top-level directory. (Or you can change to
src/test/regress and run the command there.)
At the end you should see something like:
======================= All 115 tests passed. =======================
or otherwise a note about which tests failed. See Section 32.2 below before assuming that a “failure” represents a serious problem.
Because this test method runs a temporary server, it will not work if you did the build as the root user, since the server will not start as root. Recommended procedure is not to do the build as root, or else to perform testing after completing the installation.
If you have configured PostgreSQL to install
into a location where an older PostgreSQL
installation already exists, and you perform
before installing the new version, you might find that the tests fail
because the new programs try to use the already-installed shared
libraries. (Typical symptoms are complaints about undefined symbols.)
If you wish to run the tests before overwriting the old installation,
you'll need to build with
It is not recommended that you use this option for the final installation,
The parallel regression test starts quite a few processes under your
user ID. Presently, the maximum concurrency is twenty parallel test
scripts, which means forty processes: there's a server process and a
psql process for each test script.
So if your system enforces a per-user limit on the number of processes,
make sure this limit is at least fifty or so, else you might get
random-seeming failures in the parallel test. If you are not in
a position to raise the limit, you can cut down the degree of parallelism
by setting the
MAX_CONNECTIONS parameter. For example:
make MAX_CONNECTIONS=10 check
runs no more than ten tests concurrently.
32.1.2. Running the Tests Against an Existing Installation
or for a parallel test:
The tests will expect to contact the server at the local host and the
default port number, unless directed otherwise by
PGPORT environment variables. The tests will be run in a
regression; any existing database by this name
will be dropped.
The tests will also transiently create some cluster-wide objects, such as
roles and tablespaces. These objects will have names beginning with
regress_. Beware of using
mode in installations that have any actual users or tablespaces named
32.1.3. Additional Test Suites
make check and
make installcheck commands
run only the “core” regression tests, which test built-in
functionality of the PostgreSQL server. The source
distribution also contains additional test suites, most of them having
to do with add-on functionality such as optional procedural languages.
To run all test suites applicable to the modules that have been selected to be built, including the core tests, type one of these commands at the top of the build tree:
make check-world make installcheck-world
These commands run the tests using temporary servers or an
already-installed server, respectively, just as previously explained
make check and
make installcheck. Other
considerations are the same as previously explained for each method.
make check-world builds a separate temporary
installation tree for each tested module, so it requires a great deal
more time and disk space than
Alternatively, you can run individual test suites by typing
make check or
make installcheck in the appropriate
subdirectory of the build tree. Keep in mind that
installcheck assumes you've installed the relevant module(s), not
only the core server.
The additional tests that can be invoked this way include:
Regression tests for optional procedural languages (other than PL/pgSQL, which is tested by the core tests). These are located under
Regression tests for
contribmodules, located under
contrib. Not all
contribmodules have tests.
Regression tests for the ECPG interface library, located in
Tests stressing behavior of concurrent sessions, located in
Tests of client programs under
src/bin. See also Section 32.4.
installcheck mode, these tests will destroy any
existing databases named
ecpg2_regression, as well as
The TAP-based tests are run only when PostgreSQL was configured with the
--enable-tap-tests. This is recommended for
development, but can be omitted if there is no suitable Perl installation.
32.1.4. Locale and Encoding
By default, tests using a temporary installation use the
locale defined in the current environment and the corresponding
database encoding as determined by
can be useful to test different locales by setting the appropriate
environment variables, for example:
make check LANG=C make check LC_COLLATE=en_US.utf8 LC_CTYPE=fr_CA.utf8
For implementation reasons, setting
LC_ALL does not
work for this purpose; all the other locale-related environment
variables do work.
When testing against an existing installation, the locale is determined by the existing database cluster and cannot be set separately for the test run.
You can also choose the database encoding explicitly by setting
ENCODING, for example:
make check LANG=C ENCODING=EUC_JP
Setting the database encoding this way typically only makes sense if the locale is C; otherwise the encoding is chosen automatically from the locale, and specifying an encoding that does not match the locale will result in an error.
The database encoding can be set for tests against either a temporary or an existing installation, though in the latter case it must be compatible with the installation's locale.
32.1.5. Extra Tests
The core regression test suite contains a few test files that are not
run by default, because they might be platform-dependent or take a
very long time to run. You can run these or other extra test
files by setting the variable
example, to run the
make check EXTRA_TESTS=numeric_big
To run the collation tests:
make check EXTRA_TESTS='collate.linux.utf8 collate.icu.utf8' LANG=en_US.utf8
collate.linux.utf8 test works only on Linux/glibc
collate.icu.utf8 test only works when
support for ICU was built. Both tests will only succeed when run in a
database that uses UTF-8 encoding.
32.1.6. Testing Hot Standby
The source distribution also contains regression tests for the static behavior of Hot Standby. These tests require a running primary server and a running standby server that is accepting new WAL changes from the primary (using either file-based log shipping or streaming replication). Those servers are not automatically created for you, nor is replication setup documented here. Please check the various sections of the documentation devoted to the required commands and related issues.
To run the Hot Standby tests, first create a database
regression on the primary:
psql -h primary -c "CREATE DATABASE regression"
Next, run the preparatory script
on the primary in the regression database, for example:
psql -h primary -f src/test/regress/sql/hs_primary_setup.sql regression
Allow these changes to propagate to the standby.
Now arrange for the default database connection to be to the standby
server under test (for example, by setting the
PGPORT environment variables).
make standbycheck in the regression directory:
cd src/test/regress make standbycheck
Some extreme behaviors can also be generated on the primary using the
to allow the behavior of the standby to be tested.