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943e881733
On platforms where we can read or write the whole LSN atomically, we do not need to lock the buffer header to prevent torn LSNs. We can do this only on platforms with PG_HAVE_8BYTE_SINGLE_COPY_ATOMICITY, and when the pd_lsn field is properly aligned. For historical reasons the PageXLogRecPtr was defined as a struct with two uint32 fields. This replaces it with a single uint64 value, to make the intent clearer. To prevent issues with weak typedefs the value is still wrapped in a struct. This also adjusts heapfuncs() in pageinspect, to ensure proper alignment when reading the LSN from a page on alignment-sensitive hardware. Idea by Andres Freund. Initial patch by Andreas Karlsson, improved by Peter Geoghegan. Minor tweaks by me. Author: Andreas Karlsson <andreas@proxel.se> Author: Peter Geoghegan <pg@bowt.ie> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: Tomas Vondra <tomas@vondra.me> Discussion: https://postgr.es/m/b6610c3b-3f59-465a-bdbb-8e9259f0abc4@proxel.se |
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| .. | ||
| amcheck | ||
| auth_delay | ||
| auto_explain | ||
| basebackup_to_shell | ||
| basic_archive | ||
| bloom | ||
| bool_plperl | ||
| btree_gin | ||
| btree_gist | ||
| citext | ||
| cube | ||
| dblink | ||
| dict_int | ||
| dict_xsyn | ||
| earthdistance | ||
| file_fdw | ||
| fuzzystrmatch | ||
| hstore | ||
| hstore_plperl | ||
| hstore_plpython | ||
| intagg | ||
| intarray | ||
| isn | ||
| jsonb_plperl | ||
| jsonb_plpython | ||
| lo | ||
| ltree | ||
| ltree_plpython | ||
| oid2name | ||
| pageinspect | ||
| passwordcheck | ||
| pg_buffercache | ||
| pg_freespacemap | ||
| pg_logicalinspect | ||
| pg_overexplain | ||
| pg_prewarm | ||
| pg_stat_statements | ||
| pg_surgery | ||
| pg_trgm | ||
| pg_visibility | ||
| pg_walinspect | ||
| pgcrypto | ||
| pgrowlocks | ||
| pgstattuple | ||
| postgres_fdw | ||
| seg | ||
| sepgsql | ||
| spi | ||
| sslinfo | ||
| start-scripts | ||
| tablefunc | ||
| tcn | ||
| test_decoding | ||
| tsm_system_rows | ||
| tsm_system_time | ||
| unaccent | ||
| uuid-ossp | ||
| vacuumlo | ||
| xml2 | ||
| contrib-global.mk | ||
| Makefile | ||
| meson.build | ||
| README | ||
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.