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Commitec19693

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Simplify the example of VACUUM in documentation.
Previously a detailed activity report by VACUUM VERBOSE ANALYZE wasdescribed as an example of VACUUM in docs. But it had been obsoletefor a long time. For example, commitfeb4f44updated the content of that activity report in 2003, but we hadforgotten to update the example.So basically we need to update the example. But since no one caredabout the details of VACUUM output and complained about that mistakefor such long time, per discussion on hackers, we decided to get ridof the detailed activity report from the example and simplify it.Back-patch to all supported versions.Reported by Masahiko Sawada, patch by me.Discussion:https://postgr.es/m/CAD21AoAGA2pB3p-CWmTkxBsbkZS1bcDGBLcYVcvcDxspG_XAfA@mail.gmail.com
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‎doc/src/sgml/ref/vacuum.sgml

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@@ -246,39 +246,11 @@ VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] ANALYZE [ <replaceable class="PARAMETER">
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<title>Examples</title>
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<para>
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The following is an example from running <command>VACUUM</command> on a
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table in the regression database:
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To clean a single table <literal>onek</literal>, analyze it for
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the optimizer and print a detailed vacuum activity report:
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<programlisting>
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regression=# VACUUM (VERBOSE, ANALYZE) onek;
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INFO: vacuuming "public.onek"
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INFO: index "onek_unique1" now contains 1000 tuples in 14 pages
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DETAIL: 3000 index tuples were removed.
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0 index pages have been deleted, 0 are currently reusable.
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CPU: user: 0.08 s, system: 0.01 s, elapsed: 0.18 s.
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INFO: index "onek_unique2" now contains 1000 tuples in 16 pages
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DETAIL: 3000 index tuples were removed.
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0 index pages have been deleted, 0 are currently reusable.
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CPU: user: 0.07 s, system: 0.00 s, elapsed: 0.23 s.
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INFO: index "onek_hundred" now contains 1000 tuples in 13 pages
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DETAIL: 3000 index tuples were removed.
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0 index pages have been deleted, 0 are currently reusable.
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CPU: user: 0.08 s, system: 0.01 s, elapsed: 0.17 s.
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INFO: index "onek_stringu1" now contains 1000 tuples in 48 pages
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DETAIL: 3000 index tuples were removed.
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0 index pages have been deleted, 0 are currently reusable.
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CPU: user: 0.09 s, system: 0.01 s, elapsed: 0.59 s.
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INFO: "onek": removed 3000 tuples in 108 pages
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DETAIL: CPU: user: 0.06 s, system: 0.01 s, elapsed: 0.07 s.
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INFO: "onek": found 3000 removable, 1000 nonremovable tuples in 143 pages
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DETAIL: 0 dead tuples cannot be removed yet.
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There were 0 unused item pointers.
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Skipped 0 pages due to buffer pins, 0 frozen pages.
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0 pages are entirely empty.
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CPU: user: 0.39 s, system: 0.07 s, elapsed: 1.56 s.
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INFO: analyzing "public.onek"
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INFO: "onek": 36 pages, 1000 rows sampled, 1000 estimated total rows
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VACUUM
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VACUUM (VERBOSE, ANALYZE) onek;
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</programlisting></para>
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</refsect1>
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