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Rewrite the FSM. Instead of relying on a fixed-size shared memory segment, the

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free space information is stored in a dedicated FSM relation fork, with each
relation (except for hash indexes; they don't use FSM).

This eliminates the max_fsm_relations and max_fsm_pages GUC options; remove any
trace of them from the backend, initdb, and documentation.

Rewrite contrib/pg_freespacemap to match the new FSM implementation. Also
introduce a new variant of the get_raw_page(regclass, int4, int4) function in
contrib/pageinspect that let's you to return pages from any relation fork, and
a new fsm_page_contents() function to inspect the new FSM pages.
This commit is contained in:
Heikki Linnakangas
2008-09-30 10:52:14 +00:00
parent 2dbc0ca937
commit 15c121b3ed
53 changed files with 1844 additions and 2720 deletions
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8
doc/src/sgml/ref/vacuum.sgml
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@@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/vacuum.sgml,v 1.51 2008/02/03 16:24:08 tgl Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/vacuum.sgml,v 1.52 2008/09/30 10:52:10 heikki Exp $
PostgreSQL documentation
-->
@@ -96,11 +96,7 @@ VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] ANALYZE [ <replaceable class="PARAMETER">
<term><literal>VERBOSE</literal></term>
<listitem>
<para>
Prints a detailed vacuum activity report for each table. Can be used
to help determine appropriate settings for
<xref linkend="guc-max-fsm-pages">,
<xref linkend="guc-max-fsm-relations">, and
<xref linkend="guc-default-statistics-target">.
Prints a detailed vacuum activity report for each table.
</para>
</listitem>
</varlistentry>