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doc PG 18 relnotes: add links for server variables

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Bruce Momjian
2025-06-18 21:19:42 -04:00
parent db0c93f172
commit a03805920b
1 changed files with 29 additions and 29 deletions
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doc/src/sgml/release-18.sgml
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@ -83,7 +83,7 @@ Change time zone abbreviation handling (Tom Lane)
</para> </para>
<para> <para>
The system will now favor the current session's time zone abbreviations before checking the server variable <varname>timezone_abbreviations</varname>. Previously <varname>timezone_abbreviations</varname> was The system will now favor the current session's time zone abbreviations before checking the server variable <xref linkend="guc-timezone-abbreviations"/>. Previously <varname>timezone_abbreviations</varname> was
checked first. checked first.
</para> </para>
</listitem> </listitem>
@ -101,7 +101,7 @@ Deprecate MD5 password authentication (Nathan Bossart)
<para> <para>
Support for MD5 passwords will be removed in a future major version release. <command>CREATE ROLE</command> and <command>ALTER ROLE</command> now emit deprecation warnings when setting MD5 passwords. Support for MD5 passwords will be removed in a future major version release. <command>CREATE ROLE</command> and <command>ALTER ROLE</command> now emit deprecation warnings when setting MD5 passwords.
These warnings can be disabled by setting the <varname>md5_password_warnings</varname> parameter to <literal>off</literal>. These warnings can be disabled by setting the <xref linkend="guc-md5-password-warnings"/> parameter to <literal>off</literal>.
</para> </para>
</listitem> </listitem>
@ -263,7 +263,7 @@ Automatically remove some unnecessary table self-joins (Andrey Lepikhov, Alexand
</para> </para>
<para> <para>
This optimization can be disabled using server variable <varname>enable_self_join_elimination</varname>. This optimization can be disabled using server variable <xref linkend="guc-enable-self-join-elimination"/>.
</para> </para>
</listitem> </listitem>
@ -324,7 +324,7 @@ Allow the keys of <command>SELECT DISTINCT</command> to be internally reordered
</para> </para>
<para> <para>
This optimization can be disabled using <varname>enable_distinct_reordering</varname>. This optimization can be disabled using <xref linkend="guc-enable-distinct-reordering"/>.
</para> </para>
</listitem> </listitem>
@ -606,8 +606,8 @@ Add an asynchronous I/O subsystem (Andres Freund, Thomas Munro, Nazir Bilal Yavu
<para> <para>
This feature allows backends to queue multiple read requests, which allows for more efficient sequential scans, bitmap heap scans, vacuums, etc. This feature allows backends to queue multiple read requests, which allows for more efficient sequential scans, bitmap heap scans, vacuums, etc.
This is enabled by server variable <varname>io_method</varname>, with server variables <varname>io_combine_limit</varname> and <varname>io_max_combine_limit</varname> added to control it. This also enables This is enabled by server variable <xref linkend="guc-io-method"/>, with server variables <xref linkend="guc-io-combine-limit"/> and <xref linkend="guc-io-max-combine-limit"/> added to control it. This also enables
<varname>effective_io_concurrency</varname> and <varname>maintenance_io_concurrency</varname> values greater than zero for systems without <function>fadvise()</function> support. The new system view <structname>pg_aios</structname> shows the file handles being used <xref linkend="guc-effective-io-concurrency"/> and <xref linkend="guc-maintenance-io-concurrency"/> values greater than zero for systems without <function>fadvise()</function> support. The new system view <structname>pg_aios</structname> shows the file handles being used
for asynchronous I/O. for asynchronous I/O.
</para> </para>
</listitem> </listitem>
@ -667,7 +667,7 @@ Allow normal vacuums to freeze some pages, even though they are all-visible (Mel
</para> </para>
<para> <para>
This reduces the overhead of later full-relation freezing. The aggressiveness of this can be controlled by server variable and per-table setting <varname>vacuum_max_eager_freeze_failure_rate</varname>. This reduces the overhead of later full-relation freezing. The aggressiveness of this can be controlled by server variable and per-table setting <xref linkend="guc-vacuum-max-eager-freeze-failure-rate"/>.
Previously vacuum never processed all-visible pages until freezing was required. Previously vacuum never processed all-visible pages until freezing was required.
</para> </para>
</listitem> </listitem>
@ -679,7 +679,7 @@ Author: Nathan Bossart <nathan@postgresql.org>
<listitem> <listitem>
<para> <para>
Add server variable <varname>vacuum_truncate</varname> to control file truncation during <command>VACUUM</command> (Nathan Bossart, Gurjeet Singh) Add server variable <xref linkend="guc-vacuum-truncate"/> to control file truncation during <command>VACUUM</command> (Nathan Bossart, Gurjeet Singh)
<ulink url="&commit_baseurl;0164a0f9e">&sect;</ulink> <ulink url="&commit_baseurl;0164a0f9e">&sect;</ulink>
</para> </para>
@ -697,7 +697,7 @@ Author: Melanie Plageman <melanieplageman@gmail.com>
<listitem> <listitem>
<para> <para>
Increase server variables <varname>effective_io_concurrency</varname>'s and <varname>maintenance_io_concurrency</varname>'s default values to 16 (Melanie Plageman) Increase server variables <xref linkend="guc-effective-io-concurrency"/>'s and <xref linkend="guc-maintenance-io-concurrency"/>'s default values to 16 (Melanie Plageman)
<ulink url="&commit_baseurl;ff79b5b2a">&sect;</ulink> <ulink url="&commit_baseurl;ff79b5b2a">&sect;</ulink>
<ulink url="&commit_baseurl;cc6be07eb">&sect;</ulink> <ulink url="&commit_baseurl;cc6be07eb">&sect;</ulink>
</para> </para>
@ -723,7 +723,7 @@ Author: Melanie Plageman <melanieplageman@gmail.com>
<listitem> <listitem>
<para> <para>
Increase the logging granularity of server variable <varname>log_connections</varname> (Melanie Plageman) Increase the logging granularity of server variable <xref linkend="guc-log-connections"/> (Melanie Plageman)
<ulink url="&commit_baseurl;9219093ca">&sect;</ulink> <ulink url="&commit_baseurl;9219093ca">&sect;</ulink>
</para> </para>
@ -751,7 +751,7 @@ Author: Tom Lane <tgl@sss.pgh.pa.us>
<listitem> <listitem>
<para> <para>
Add <varname>log_line_prefix</varname> escape <literal>%L</literal> to output the client <acronym>IP</acronym> address (Greg Sabino Mullane) Add <xref linkend="guc-log-line-prefix"/> escape <literal>%L</literal> to output the client <acronym>IP</acronym> address (Greg Sabino Mullane)
<ulink url="&commit_baseurl;3516ea768">&sect;</ulink> <ulink url="&commit_baseurl;3516ea768">&sect;</ulink>
</para> </para>
</listitem> </listitem>
@ -763,7 +763,7 @@ Author: Fujii Masao <fujii@postgresql.org>
<listitem> <listitem>
<para> <para>
Add server variable <varname>log_lock_failures</varname> to log lock acquisition failures (Yuki Seino) Add server variable <xref linkend="guc-log-lock-failures"/> to log lock acquisition failures (Yuki Seino)
<ulink url="&commit_baseurl;6d376c3b0">&sect;</ulink> <ulink url="&commit_baseurl;6d376c3b0">&sect;</ulink>
</para> </para>
@ -804,7 +804,7 @@ Add delay time reporting to <command>VACUUM</command> and <command>ANALYZE</comm
<para> <para>
This information appears in the autovacuum logs, the system views <structname>pg_stat_progress_vacuum</structname> and <structname>pg_stat_progress_analyze</structname>, and the output of <command>VACUUM</command> and <command>ANALYZE</command> when in <literal>VERBOSE</literal> This information appears in the autovacuum logs, the system views <structname>pg_stat_progress_vacuum</structname> and <structname>pg_stat_progress_analyze</structname>, and the output of <command>VACUUM</command> and <command>ANALYZE</command> when in <literal>VERBOSE</literal>
mode; tracking must be enabled with the server variable <varname>track_cost_delay_timing</varname>. mode; tracking must be enabled with the server variable <xref linkend="guc-track-cost-delay-timing"/>.
</para> </para>
</listitem> </listitem>
@ -900,7 +900,7 @@ Author: Michael Paquier <michael@paquier.xyz>
<listitem> <listitem>
<para> <para>
Change server variable <varname>track_wal_io_timing</varname> to control tracking <acronym>WAL</acronym> timing in <structname>pg_stat_io</structname> instead of <structname>pg_stat_wal</structname> (Bertrand Drouvot) Change server variable <xref linkend="guc-track-wal-io-timing"/> to control tracking <acronym>WAL</acronym> timing in <structname>pg_stat_io</structname> instead of <structname>pg_stat_wal</structname> (Bertrand Drouvot)
<ulink url="&commit_baseurl;6c349d83b">&sect;</ulink> <ulink url="&commit_baseurl;6c349d83b">&sect;</ulink>
</para> </para>
</listitem> </listitem>
@ -1144,7 +1144,7 @@ Add support for the OAuth authentication method (Jacob Champion, Daniel Gustafss
</para> </para>
<para> <para>
This adds an <literal>oauth</literal> authentication method to <filename>pg_hba.conf</filename>, libpq OAuth options, a server variable <varname>oauth_validator_libraries</varname> to load token validation libraries, and This adds an <literal>oauth</literal> authentication method to <filename>pg_hba.conf</filename>, libpq OAuth options, a server variable <xref linkend="guc-oauth-validator-libraries"/> to load token validation libraries, and
a configure flag <option>--with-libcurl</option> to add the required compile-time libraries. a configure flag <option>--with-libcurl</option> to add the required compile-time libraries.
</para> </para>
</listitem> </listitem>
@ -1156,7 +1156,7 @@ Author: Daniel Gustafsson <dgustafsson@postgresql.org>
<listitem> <listitem>
<para> <para>
Add server variable <varname>ssl_tls13_ciphers</varname> to allow specification of multiple colon-separated TLSv1.3 cipher suites (Erica Zhang, Daniel Gustafsson) Add server variable <xref linkend="guc-ssl-tls13-ciphers"/> to allow specification of multiple colon-separated TLSv1.3 cipher suites (Erica Zhang, Daniel Gustafsson)
<ulink url="&commit_baseurl;45188c2ea">&sect;</ulink> <ulink url="&commit_baseurl;45188c2ea">&sect;</ulink>
</para> </para>
</listitem> </listitem>
@ -1168,7 +1168,7 @@ Author: Daniel Gustafsson <dgustafsson@postgresql.org>
<listitem> <listitem>
<para> <para>
Change server variable <varname>ssl_groups</varname>'s default to include elliptic curve X25519 (Daniel Gustafsson, Jacob Champion) Change server variable <xref linkend="guc-ssl-groups"/>'s default to include elliptic curve X25519 (Daniel Gustafsson, Jacob Champion)
<ulink url="&commit_baseurl;daa02c6bd">&sect;</ulink> <ulink url="&commit_baseurl;daa02c6bd">&sect;</ulink>
</para> </para>
</listitem> </listitem>
@ -1180,7 +1180,7 @@ Author: Daniel Gustafsson <dgustafsson@postgresql.org>
<listitem> <listitem>
<para> <para>
Rename server variable <varname>ssl_ecdh_curve</varname> to <varname>ssl_groups</varname> and allow multiple colon-separated <acronym>ECDH</acronym> curves to be specified (Erica Zhang, Daniel Gustafsson) Rename server variable <varname>ssl_ecdh_curve</varname> to <xref linkend="guc-ssl-groups"/> and allow multiple colon-separated <acronym>ECDH</acronym> curves to be specified (Erica Zhang, Daniel Gustafsson)
<ulink url="&commit_baseurl;3d1ef3a15">&sect;</ulink> <ulink url="&commit_baseurl;3d1ef3a15">&sect;</ulink>
</para> </para>
@ -1226,12 +1226,12 @@ Author: Nathan Bossart <nathan@postgresql.org>
<listitem> <listitem>
<para> <para>
Add server variable <varname>autovacuum_worker_slots</varname> to specify the maximum number of background workers (Nathan Bossart) Add server variable <xref linkend="guc-autovacuum-worker-slots"/> to specify the maximum number of background workers (Nathan Bossart)
<ulink url="&commit_baseurl;c758119e5">&sect;</ulink> <ulink url="&commit_baseurl;c758119e5">&sect;</ulink>
</para> </para>
<para> <para>
With this variable set, <varname>autovacuum_max_workers</varname> can be adjusted at runtime up to this maximum without a server restart. With this variable set, <xref linkend="guc-autovacuum-max-workers"/> can be adjusted at runtime up to this maximum without a server restart.
</para> </para>
</listitem> </listitem>
@ -1247,7 +1247,7 @@ Allow specification of the fixed number of dead tuples that will trigger an auto
</para> </para>
<para> <para>
The server variable is <varname>autovacuum_vacuum_max_threshold</varname>. Percentages are still used for triggering. The server variable is <xref linkend="guc-autovacuum-vacuum-max-threshold"/>. Percentages are still used for triggering.
</para> </para>
</listitem> </listitem>
@ -1258,7 +1258,7 @@ Author: Andres Freund <andres@anarazel.de>
<listitem> <listitem>
<para> <para>
Change server variable <varname>max_files_per_process</varname> to limit only files opened by a backend (Andres Freund) Change server variable <xref linkend="guc-max-files-per-process"/> to limit only files opened by a backend (Andres Freund)
<ulink url="&commit_baseurl;adb5f85fa">&sect;</ulink> <ulink url="&commit_baseurl;adb5f85fa">&sect;</ulink>
</para> </para>
@ -1274,7 +1274,7 @@ Author: Nathan Bossart <nathan@postgresql.org>
<listitem> <listitem>
<para> <para>
Add server variable <varname>num_os_semaphores</varname> to report the required number of semaphores (Nathan Bossart) Add server variable <xref linkend="guc-num-os-semaphores"/> to report the required number of semaphores (Nathan Bossart)
<ulink url="&commit_baseurl;0dcaea569">&sect;</ulink> <ulink url="&commit_baseurl;0dcaea569">&sect;</ulink>
</para> </para>
@ -1292,7 +1292,7 @@ Author: Peter Eisentraut <peter@eisentraut.org>
<listitem> <listitem>
<para> <para>
Add server variable <varname>extension_control_path</varname> to specify the location of extension control files (Peter Eisentraut, Matheus Alcantara) Add server variable <xref linkend="guc-extension-control-path"/> to specify the location of extension control files (Peter Eisentraut, Matheus Alcantara)
<ulink url="&commit_baseurl;4f7f7b037">&sect;</ulink> <ulink url="&commit_baseurl;4f7f7b037">&sect;</ulink>
<ulink url="&commit_baseurl;81eaaa2c4">&sect;</ulink> <ulink url="&commit_baseurl;81eaaa2c4">&sect;</ulink>
</para> </para>
@ -1314,7 +1314,7 @@ Author: Amit Kapila <akapila@postgresql.org>
<listitem> <listitem>
<para> <para>
Allow inactive replication slots to be automatically invalided using server variable <varname>idle_replication_slot_timeout</varname> (Nisha Moond, Bharath Rupireddy) Allow inactive replication slots to be automatically invalided using server variable <xref linkend="guc-idle-replication-slot-timeout"/> (Nisha Moond, Bharath Rupireddy)
<ulink url="&commit_baseurl;ac0e33136">&sect;</ulink> <ulink url="&commit_baseurl;ac0e33136">&sect;</ulink>
</para> </para>
</listitem> </listitem>
@ -1326,12 +1326,12 @@ Author: Masahiko Sawada <msawada@postgresql.org>
<listitem> <listitem>
<para> <para>
Add server variable <varname>max_active_replication_origins</varname> to control the maximum active replication origins (Euler Taveira) Add server variable <xref linkend="guc-max-active-replication-origins"/> to control the maximum active replication origins (Euler Taveira)
<ulink url="&commit_baseurl;04ff636cb">&sect;</ulink> <ulink url="&commit_baseurl;04ff636cb">&sect;</ulink>
</para> </para>
<para> <para>
This was previously controlled by <varname>max_replication_slots</varname>, but this new setting allows a higher origin count in cases where fewer slots are required. This was previously controlled by <xref linkend="guc-max-replication-slots"/>, but this new setting allows a higher origin count in cases where fewer slots are required.
</para> </para>
</listitem> </listitem>
@ -1583,7 +1583,7 @@ Author: Thomas Munro <tmunro@postgresql.org>
<listitem> <listitem>
<para> <para>
Add server variable <varname>file_copy_method</varname> to control the file copying method (Nazir Bilal Yavuz) Add server variable <xref linkend="guc-file-copy-method"/> to control the file copying method (Nazir Bilal Yavuz)
<ulink url="&commit_baseurl;f78ca6f3e">&sect;</ulink> <ulink url="&commit_baseurl;f78ca6f3e">&sect;</ulink>
</para> </para>
@ -2271,7 +2271,7 @@ Author: Tomas Vondra <tomas.vondra@postgresql.org>
<listitem> <listitem>
<para> <para>
Report <varname>search_path</varname> changes to the client (Alexander Kukushkin, Jelte Fennema-Nio, Tomas Vondra) Report <xref linkend="guc-search-path"/> changes to the client (Alexander Kukushkin, Jelte Fennema-Nio, Tomas Vondra)
<ulink url="&commit_baseurl;28a1121fd">&sect;</ulink> <ulink url="&commit_baseurl;28a1121fd">&sect;</ulink>
<ulink url="&commit_baseurl;0d06a7eac">&sect;</ulink> <ulink url="&commit_baseurl;0d06a7eac">&sect;</ulink>
</para> </para>