Currently the latency is not computed and displayed consistently:
- the computation is wrong under -t (duration is zero...)
- depending on the conditions it is shown with a ":" syntax or
a "=" syntax.
The attached minor patch makes the computation & display more consistent.
--
Fabien.
diff --git a/doc/src/sgml/ref/pgbench.sgml b/doc/src/sgml/ref/pgbench.sgml
index f3afedb..26c030e 100644
--- a/doc/src/sgml/ref/pgbench.sgml
+++ b/doc/src/sgml/ref/pgbench.sgml
@@ -1254,8 +1254,8 @@ number of clients: 10
number of threads: 1
number of transactions per client: 1000
number of transactions actually processed: 10000/10000
-latency average = 15.844 ms
-latency stddev = 2.715 ms
+latency average: 15.844 ms
+latency stddev: 2.715 ms
tps = 618.764555 (including connections establishing)
tps = 622.977698 (excluding connections establishing)
script statistics:
diff --git a/src/bin/pgbench/pgbench.c b/src/bin/pgbench/pgbench.c
index 87fb006..6eb9f28 100644
--- a/src/bin/pgbench/pgbench.c
+++ b/src/bin/pgbench/pgbench.c
@@ -3237,8 +3237,8 @@ printSimpleStats(char *prefix, SimpleStats *ss)
double latency = ss->sum / ss->count;
double stddev = sqrt(ss->sum2 / ss->count - latency * latency);
- printf("%s average = %.3f ms\n", prefix, 0.001 * latency);
- printf("%s stddev = %.3f ms\n", prefix, 0.001 * stddev);
+ printf("%s average: %.3f ms\n", prefix, 0.001 * latency);
+ printf("%s stddev: %.3f ms\n", prefix, 0.001 * stddev);
}
/* print out results */
@@ -3291,9 +3291,9 @@ printResults(TState *threads, StatsData *total, instr_time total_time,
if (throttle_delay || progress || latency_limit)
printSimpleStats("latency", &total->latency);
else
- /* only an average latency computed from the duration is available */
+ /* no measure, show average latency computed from run time */
printf("latency average: %.3f ms\n",
- 1000.0 * duration * nclients / total->cnt);
+ 1000.0 * time_include * nclients / total->cnt);
if (throttle_delay)
{
--
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