Fix pgbench's calculation of average latency, when -T is not used.

If the test duration was given in # of transactions (-t or no option),
rather as a duration (-T), the latency average was always printed as 0.
It has been broken ever since the display of latency average was added,
in 9.4.

Fabien Coelho

Discussion: <alpine.DEB.2.20.1607131015370.7486@sto>

diff --git a/contrib/pgbench/pgbench.c b/contrib/pgbench/pgbench.c
index 807d7dcdb8d820fb22f58e139144b724833ecce7..ee2df8fb33ce6b7c3d325c0e07b2b0c44971bbf6 100644 (file)
--- a/contrib/pgbench/pgbench.c
+++ b/contrib/pgbench/pgbench.c
@@ -2353,9 +2353,9 @@ printResults(int ttype, int64 normal_xacts, int nclients,
    }
    else
    {
-       /* only an average latency computed from the duration is available */
+       /* no measurement, show average latency computed from run time */
        printf("latency average: %.3f ms\n",
-              1000.0 * duration * nclients / normal_xacts);
+              1000.0 * time_include * nclients / normal_xacts);
    }
 
    if (throttle_delay)