By default, set log_line_prefix = '%m [%p] '.
This value might not be to everyone's taste; in particular, some people might prefer %t to %m, and others may want %u, %d, or other fields. However, it's a vast improvement on the old default of ''. Christoph Berg
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@ -5004,7 +5004,8 @@ local0.* /var/log/postgresql
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value will pad on the left. Padding can be useful to aid human
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readability in log files.
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This parameter can only be set in the <filename>postgresql.conf</>
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file or on the server command line. The default is an empty string.
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file or on the server command line. The default is
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<literal>'%m [%p] '</> which logs a time stamp and the process ID.
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<informaltable>
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<tgroup cols="3">
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@ -5142,6 +5143,17 @@ FROM pg_stat_activity;
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include those escapes if you are logging to <application>syslog</>.
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</para>
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</tip>
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<tip>
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<para>
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The <literal>%q</> escape is useful when including information that is
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only available in session (backend) context like user or database
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name. For example:
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<programlisting>
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log_line_prefix = '%m [%p] %q%u@%d/%a '
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</programlisting>
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</para>
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</tip>
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</listitem>
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</varlistentry>
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@ -3014,7 +3014,7 @@ static struct config_string ConfigureNamesString[] =
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gettext_noop("If blank, no prefix is used.")
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},
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&Log_line_prefix,
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"",
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"%m [%p] ",
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NULL, NULL, NULL
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},
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@ -430,7 +430,7 @@
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#log_duration = off
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#log_error_verbosity = default # terse, default, or verbose messages
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#log_hostname = off
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#log_line_prefix = '' # special values:
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#log_line_prefix = '%m [%p] ' # special values:
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# %a = application name
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# %u = user name
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# %d = database name
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