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

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
View File

@ -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,