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Provide a log_level setting for auto_explain

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Up to now the log level has been hardcoded at LOG. A new
auto_explain.log_level setting allows that to be modified.

Discussion: https://postgr.es/m/CAPPfruyZh+snR2AdmutrA0B_caj=yWZkLqxUTZYNjJCaQ_wKQg@mail.gmail.com

Tom Dunstan and Andrew Dunstan
Reviewed by Daniel Gustafsson
This commit is contained in:
Andrew Dunstan 2018-07-31 08:03:57 -04:00
parent 6574f19127
commit 2d36a5e9da
2 changed files with 49 additions and 1 deletions
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29
contrib/auto_explain/auto_explain.c
View File

@ -28,6 +28,7 @@ static bool auto_explain_log_buffers = false;
static bool auto_explain_log_triggers = false; static bool auto_explain_log_triggers = false;
static bool auto_explain_log_timing = true; static bool auto_explain_log_timing = true;
static int auto_explain_log_format = EXPLAIN_FORMAT_TEXT; static int auto_explain_log_format = EXPLAIN_FORMAT_TEXT;
static int auto_explain_log_level = LOG;
static bool auto_explain_log_nested_statements = false; static bool auto_explain_log_nested_statements = false;
static double auto_explain_sample_rate = 1; static double auto_explain_sample_rate = 1;
@ -39,6 +40,20 @@ static const struct config_enum_entry format_options[] = {
{NULL, 0, false} {NULL, 0, false}
}; };
static const struct config_enum_entry loglevel_options[] = {
{"debug5", DEBUG5, false},
{"debug4", DEBUG4, false},
{"debug3", DEBUG3, false},
{"debug2", DEBUG2, false},
{"debug1", DEBUG1, false},
{"debug", DEBUG2, true},
{"info", INFO, false},
{"notice", NOTICE, false},
{"warning", WARNING, false},
{"log", LOG, false},
{NULL, 0, false}
};
/* Current nesting depth of ExecutorRun calls */ /* Current nesting depth of ExecutorRun calls */
static int nesting_level = 0; static int nesting_level = 0;
@ -141,6 +156,18 @@ _PG_init(void)
NULL, NULL,
NULL); NULL);
DefineCustomEnumVariable("auto_explain.log_level",
"Log level for the plan.",
NULL,
&auto_explain_log_level,
LOG,
loglevel_options,
PGC_SUSET,
0,
NULL,
NULL,
NULL);
DefineCustomBoolVariable("auto_explain.log_nested_statements", DefineCustomBoolVariable("auto_explain.log_nested_statements",
"Log nested statements.", "Log nested statements.",
NULL, NULL,
@ -353,7 +380,7 @@ explain_ExecutorEnd(QueryDesc *queryDesc)
* reported. This isn't ideal but trying to do it here would * reported. This isn't ideal but trying to do it here would
* often result in duplication. * often result in duplication.
*/ */
ereport(LOG, ereport(auto_explain_log_level,
(errmsg("duration: %.3f ms plan:\n%s", (errmsg("duration: %.3f ms plan:\n%s",
msec, es->str->data), msec, es->str->data),
errhidestmt(true))); errhidestmt(true)));

21
doc/src/sgml/auto-explain.sgml
View File

@ -187,6 +187,27 @@ LOAD 'auto_explain';
</listitem> </listitem>
</varlistentry> </varlistentry>
<varlistentry>
<term>
<varname>auto_explain.log_level</varname> (<type>enum</type>)
<indexterm>
<primary><varname>auto_explain.log_level</> configuration parameter</primary>
</indexterm>
</term>
<listitem>
<para>
<varname>auto_explain.log_level</varname> selects the log level at which
auto_explain will log the query plan.
Valid values are <literal>DEBUG5</literal>, <literal>DEBUG4</literal>,
<literal>DEBUG3</literal>, <literal>DEBUG2</literal>,
<literal>DEBUG1</literal>, <literal>INFO</literal>,
<literal>NOTICE</literal>, <literal>WARNING</literal>,
and <literal>LOG</literal>. The default is <literal>LOG</literal>.
Only superusers can change this setting.
</para>
</listitem>
</varlistentry>
<varlistentry> <varlistentry>
<term> <term>
<varname>auto_explain.log_nested_statements</varname> (<type>boolean</type>) <varname>auto_explain.log_nested_statements</varname> (<type>boolean</type>)