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Adjust display of actual runtimes in EXPLAIN output to use three fractional

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digits, and label it 'ms' not 'msec', for consistency with psql's \timing
display.  Per recent discussions.
This commit is contained in:
Tom Lane 2003-10-17 01:14:26 +00:00
parent fa2356a1ac
commit fe1b5034dd
3 changed files with 12 additions and 12 deletions
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10
doc/src/sgml/perform.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/perform.sgml,v 1.34 2003/10/10 02:08:42 momjian Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/perform.sgml,v 1.35 2003/10/17 01:14:26 tgl Exp $
-->
<chapter id="performance-tips">
@ -284,16 +284,16 @@ EXPLAIN ANALYZE SELECT * FROM tenk1 t1, tenk2 t2 WHERE t1.unique1 &lt; 50 AND t1
QUERY PLAN
-------------------------------------------------------------------------------
Nested Loop (cost=0.00..327.02 rows=49 width=296)
(actual time=1.18..29.82 rows=50 loops=1)
(actual time=1.181..29.822 rows=50 loops=1)
-&gt; Index Scan using tenk1_unique1 on tenk1 t1
(cost=0.00..179.33 rows=49 width=148)
(actual time=0.63..8.91 rows=50 loops=1)
(actual time=0.630..8.917 rows=50 loops=1)
Index Cond: (unique1 &lt; 50)
-&gt; Index Scan using tenk2_unique2 on tenk2 t2
(cost=0.00..3.01 rows=1 width=148)
(actual time=0.29..0.32 rows=1 loops=50)
(actual time=0.295..0.324 rows=1 loops=50)
Index Cond: ("outer".unique2 = t2.unique2)
Total runtime: 31.60 msec
Total runtime: 31.604 ms
</screen>
Note that the <quote>actual time</quote> values are in milliseconds of

8
doc/src/sgml/ref/explain.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/explain.sgml,v 1.30 2003/09/12 00:12:47 tgl Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/explain.sgml,v 1.31 2003/10/17 01:14:26 tgl Exp $
PostgreSQL documentation
-->
@ -210,10 +210,10 @@ EXPLAIN ANALYZE EXECUTE query(100, 200);
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------
HashAggregate (cost=39.53..39.53 rows=1 width=8) (actual time=0.66..0.67 rows=7 loops=1)
-&gt; Index Scan using test_pkey on test (cost=0.00..32.97 rows=1311 width=8) (actual time=0.05..0.39 rows=99 loops=1)
HashAggregate (cost=39.53..39.53 rows=1 width=8) (actual time=0.661..0.672 rows=7 loops=1)
-&gt; Index Scan using test_pkey on test (cost=0.00..32.97 rows=1311 width=8) (actual time=0.050..0.395 rows=99 loops=1)
Index Cond: ((id &gt; $1) AND (id &lt; $2))
Total runtime: 0.85 msec
Total runtime: 0.851 ms
(4 rows)
</programlisting>
</para>

6
src/backend/commands/explain.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994-5, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.116 2003/09/25 18:58:35 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.117 2003/10/17 01:14:26 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -270,7 +270,7 @@ ExplainOnePlan(QueryDesc *queryDesc, ExplainStmt *stmt,
if (es->printCost)
{
if (stmt->analyze)
appendStringInfo(str, "Total runtime: %.2f msec\n",
appendStringInfo(str, "Total runtime: %.3f ms\n",
1000.0 * totaltime);
do_text_output_multiline(tstate, str->data);
}
@ -582,7 +582,7 @@ explain_outNode(StringInfo str,
{
double nloops = planstate->instrument->nloops;
appendStringInfo(str, " (actual time=%.2f..%.2f rows=%.0f loops=%.0f)",
appendStringInfo(str, " (actual time=%.3f..%.3f rows=%.0f loops=%.0f)",
1000.0 * planstate->instrument->startup / nloops,
1000.0 * planstate->instrument->total / nloops,
planstate->instrument->ntuples / nloops,