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doc: vacuum_cost_limit controls when vacuum_cost_delay happens
Mention this relationship. Reported-by: Martín Marqués Discussion: https://postgr.es/m/CABeG9LtsAVP4waKngUYo-HAiiowcb8xEjQvDDfhX_nFi5SJ4jw@mail.gmail.com Author: Martín Marqués Backpatch-through: master
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@ -2303,8 +2303,8 @@ include_dir 'conf.d'
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</term>
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</term>
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<listitem>
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<listitem>
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<para>
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<para>
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The accumulated cost that will cause the vacuuming process to sleep.
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This is the accumulated cost that will cause the vacuuming process to sleep
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The default value is 200.
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for <varname>vacuum_cost_delay</varname>. The default is 200.
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</para>
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</para>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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@ -2364,7 +2364,7 @@ include_dir 'conf.d'
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<varname>bgwriter_delay</varname>.
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<varname>bgwriter_delay</varname>.
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If this value is specified without units, it is taken as milliseconds.
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If this value is specified without units, it is taken as milliseconds.
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The default value is 200
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The default value is 200
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milliseconds (<literal>200ms</literal>). Note that on many systems, the
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milliseconds (<literal>200ms</literal>). Note that on some systems, the
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effective resolution of sleep delays is 10 milliseconds; setting
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effective resolution of sleep delays is 10 milliseconds; setting
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<varname>bgwriter_delay</varname> to a value that is not a multiple of 10
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<varname>bgwriter_delay</varname> to a value that is not a multiple of 10
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might have the same results as setting it to the next higher multiple
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might have the same results as setting it to the next higher multiple
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@ -3258,7 +3258,7 @@ include_dir 'conf.d'
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flushed to disk.
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flushed to disk.
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If this value is specified without units, it is taken as milliseconds.
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If this value is specified without units, it is taken as milliseconds.
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The default value is 200 milliseconds (<literal>200ms</literal>). Note that
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The default value is 200 milliseconds (<literal>200ms</literal>). Note that
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on many systems, the effective resolution of sleep delays is 10
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on some systems, the effective resolution of sleep delays is 10
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milliseconds; setting <varname>wal_writer_delay</varname> to a value that is
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milliseconds; setting <varname>wal_writer_delay</varname> to a value that is
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not a multiple of 10 might have the same results as setting it to the
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not a multiple of 10 might have the same results as setting it to the
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next higher multiple of 10. This parameter can only be set in the
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next higher multiple of 10. This parameter can only be set in the
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