pgbench: Tweak documentation.

Fabien COELHO

contrib/pgbench/pgbench.c

@@ -369,7 +369,7 @@ usage(void)
 		   "  -N, --skip-some-updates  skip updates of pgbench_tellers and pgbench_branches\n"
 		   "  -P, --progress=NUM       show thread progress report every NUM seconds\n"
 		   "  -r, --report-latencies   report average latency per command\n"
-		   "  -R, --rate=SPEC          target rate in transactions per second\n"
+		   "  -R, --rate=NUM           target rate in transactions per second\n"
 		   "  -s, --scale=NUM          report this scale factor in output\n"
 		   "  -S, --select-only        perform SELECT-only transactions\n"
 		   "  -t, --transactions       number of transactions each client runs "

doc/src/sgml/pgbench.sgml

@@ -429,7 +429,7 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
        </para>
        <para>
         The rate is targeted by starting transactions along a
-        Poisson-distributed schedule time line.  The expected finish time
+        Poisson-distributed schedule time line.  The expected start time
         schedule moves forward based on when the client first started, not
         when the previous transaction ended.  That approach means that when
         transactions go past their original scheduled end time, it is