Add syslog_sequence_numbers parameter
Reviewed-by: Andreas Karlsson <andreas@proxel.se>
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@ -4305,6 +4305,34 @@ local0.* /var/log/postgresql
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</listitem>
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</varlistentry>
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<varlistentry id="guc-syslog-sequence-numbers" xreflabel="syslog_sequence_numbers">
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<term><varname>syslog_sequence_numbers</varname> (<type>boolean</type>)
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<indexterm>
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<primary><varname>syslog_sequence_numbers</> configuration parameter</primary>
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</indexterm>
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</term>
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<listitem>
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<para>
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When logging to <application>syslog</application> and this is on (the
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default), then each message will be prefixed by an increasing
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sequence number (such as <literal>[2]</literal>). This circumvents
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the <quote>--- last message repeated N times ---</quote> suppression
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that many syslog implementations perform by default. In more modern
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syslog implementations, repeat message suppression can be configured
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(for example, <literal>$RepeatedMsgReduction</literal>
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in <productname>rsyslog</productname>), so this might not be
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necessary. Also, you could turn this off if you actually want to
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suppress repeated messages.
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</para>
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<para>
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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.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry id="guc-event-source" xreflabel="event_source">
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<term><varname>event_source</varname> (<type>string</type>)
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<indexterm>
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@ -106,6 +106,7 @@ int Log_error_verbosity = PGERROR_VERBOSE;
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char *Log_line_prefix = NULL; /* format for extra log line info */
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int Log_destination = LOG_DESTINATION_STDERR;
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char *Log_destination_string = NULL;
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bool syslog_sequence_numbers = true;
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#ifdef HAVE_SYSLOG
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@ -2018,7 +2019,11 @@ write_syslog(int level, const char *line)
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chunk_nr++;
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syslog(level, "[%lu-%d] %s", seq, chunk_nr, buf);
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if (syslog_sequence_numbers)
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syslog(level, "[%lu-%d] %s", seq, chunk_nr, buf);
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else
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syslog(level, "[%d] %s", chunk_nr, buf);
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line += buflen;
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len -= buflen;
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}
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@ -2026,7 +2031,10 @@ write_syslog(int level, const char *line)
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else
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{
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/* message short enough */
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syslog(level, "[%lu] %s", seq, line);
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if (syslog_sequence_numbers)
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syslog(level, "[%lu] %s", seq, line);
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else
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syslog(level, "%s", line);
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}
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}
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#endif /* HAVE_SYSLOG */
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@ -1632,6 +1632,16 @@ static struct config_bool ConfigureNamesBool[] =
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NULL, NULL, NULL
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},
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{
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{"syslog_sequence_numbers", PGC_SIGHUP, LOGGING_WHERE,
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gettext_noop("Add sequence number to syslog messags to avoid duplicate suppression."),
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NULL
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},
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&syslog_sequence_numbers,
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true,
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NULL, NULL, NULL
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},
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/* End-of-list marker */
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{
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{NULL, 0, 0, NULL, NULL}, NULL, false, NULL, NULL, NULL
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@ -358,6 +358,7 @@
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# These are relevant when logging to syslog:
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#syslog_facility = 'LOCAL0'
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#syslog_ident = 'postgres'
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#syslog_sequence_numbers = on
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# This is only relevant when logging to eventlog (win32):
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#event_source = 'PostgreSQL'
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@ -397,6 +397,7 @@ extern int Log_error_verbosity;
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extern char *Log_line_prefix;
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extern int Log_destination;
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extern char *Log_destination_string;
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extern bool syslog_sequence_numbers;
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/* Log destination bitmap */
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#define LOG_DESTINATION_STDERR 1
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