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Amit Kapila f8a6d8e71b Fix running out of file descriptors for spill files. 
Currently while decoding changes, if the number of changes exceeds a
certain threshold, we spill those to disk.  And this happens for each
(sub)transaction.  Now, while reading all these files, we don't close them
until we read all the files.  While reading these files, if the number of
such files exceeds the maximum number of file descriptors, the operation
errors out.

Use PathNameOpenFile interface to open these files as that internally has
the mechanism to release kernel FDs as needed to get us under the
max_safe_fds limit.

Reported-by: Amit Khandekar
Author: Amit Khandekar
Reviewed-by: Amit Kapila
Backpatch-through: 9.4
Discussion: https://postgr.es/m/CAJ3gD9c-sECEn79zXw4yBnBdOttacoE-6gAyP0oy60nfs_sabQ@mail.gmail.com
2020-01-02 11:53:53 +05:30
..
authentication Update copyright for 2019 2019-01-02 12:44:25 -05:00
examples Update copyright for 2019 2019-01-02 12:44:25 -05:00
isolation Improve isolationtester's timeout management. 2019-12-09 14:31:57 -05:00
kerberos Save Kerberos and LDAP daemon logs where the buildfarm can find them. 2019-08-06 17:08:32 -04:00
ldap Be more careful about port selection in src/test/ldap/. 2019-09-09 14:21:47 -04:00
locale Make sort-test.py Python 3 compatible 2019-01-04 11:23:24 +01:00
mb Fix MB regression tests for WAL-logging of hash indexes. 2017-03-15 07:25:36 -04:00
modules Avoid using INFO elevel for what are fundamentally debug messages. 2019-09-07 19:03:11 -04:00
perl Suppress another CR in program output 2019-09-30 15:50:54 -04:00
recovery Fix running out of file descriptors for spill files. 2020-01-02 11:53:53 +05:30
regress Disallow partition key expressions that return pseudo-types. 2019-12-23 12:53:13 -05:00
ssl Allow SSL TAP tests to run on Windows 2019-09-29 17:49:44 -04:00
subscription Add test coverage for "unchanged toast column" replication code path. 2019-11-22 12:52:26 -05:00
thread Ensure link commands list *.o files before LDFLAGS. 2019-01-02 13:57:54 -05:00
Makefile Revert "Allow on-line enabling and disabling of data checksums" 2018-04-09 19:03:42 +02:00
README Add TAP tests for password-based authentication methods. 2017-03-17 11:34:16 +02:00

README 

PostgreSQL tests
================

This directory contains a variety of test infrastructure as well as some of the
tests in PostgreSQL. Not all tests are here -- in particular, there are more in
individual contrib/ modules and in src/bin.

Not all these tests get run by "make check". Check src/test/Makefile to see
which tests get run automatically.

authentication/
  Tests for authentication

examples/
  Demonstration programs for libpq that double as regression tests via
  "make check"

isolation/
  Tests for concurrent behavior at the SQL level

locale/
  Sanity checks for locale data, encodings, etc

mb/
  Tests for multibyte encoding (UTF-8) support

modules/
  Extensions used only or mainly for test purposes, generally not suitable
  for installing in production databases

perl/
  Infrastructure for Perl-based TAP tests

recovery/
  Test suite for recovery and replication

regress/
  PostgreSQL's main regression test suite, pg_regress

ssl/
  Tests to exercise and verify SSL certificate handling

subscription/
  Tests for logical replication

thread/
  A thread-safety-testing utility used by configure