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It can be useful to know when a relation has last been used, e.g., when evaluating whether an index is still required. It was already possible to infer the time of the last usage by tracking, e.g., pg_stat_all_indexes.idx_scan over time. But far from everybody does so. To make it easier to detect the last time a relation has been scanned, track that time in each relation's pgstat entry. To minimize overhead a) the timestamp is updated only when the backend pending stats entry is flushed to shared stats b) the last transaction's stop timestamp is used as the timestamp. Bumps catalog and stats format versions. Author: Dave Page <dpage@pgadmin.org> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: Bruce Momjian <bruce@momjian.us> Reviewed-by: Vik Fearing <vik@postgresfriends.org> Discussion: https://postgr.es/m/CA+OCxozrVHNFVEPkweUHMZje+t1tfY816d9MZYc6eZwOOusOaQ@mail.gmail.com |
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| authentication | ||
| examples | ||
| icu | ||
| isolation | ||
| kerberos | ||
| ldap | ||
| locale | ||
| mb | ||
| modules | ||
| perl | ||
| recovery | ||
| regress | ||
| ssl | ||
| subscription | ||
| Makefile | ||
| meson.build | ||
| 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 (but see also below) examples/ Demonstration programs for libpq that double as regression tests via "make check" isolation/ Tests for concurrent behavior at the SQL level kerberos/ Tests for Kerberos/GSSAPI authentication and encryption ldap/ Tests for LDAP-based authentication 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