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pgbench: Improve time logic.

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Instead of instr_time (struct timespec) and the INSTR_XXX macros,
introduce pg_time_usec_t and use integer arithmetic.  Don't include the
connection time in TPS unless using -C mode, but report it separately.

Author: Fabien COELHO <coelho@cri.ensmp.fr>
Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Discussion: https://postgr.es/m/20200227180100.zyvjwzcpiokfsqm2%40alap3.anarazel.de
This commit is contained in:
Thomas Munro
2021-03-10 16:09:50 +13:00
parent b1d6a8f868
commit 547f04e734
4 changed files with 232 additions and 245 deletions
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39
doc/src/sgml/ref/pgbench.sgml
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@ -58,8 +58,10 @@ number of clients: 10
number of threads: 1
number of transactions per client: 1000
number of transactions actually processed: 10000/10000
tps = 85.184871 (including connections establishing)
tps = 85.296346 (excluding connections establishing)
latency average = 11.013 ms
latency stddev = 7.351 ms
initial connection time = 45.758 ms
tps = 896.967014 (without initial connection time)
</screen>
The first six lines report some of the most important parameter
@ -68,8 +70,7 @@ tps = 85.296346 (excluding connections establishing)
and number of transactions per client); these will be equal unless the run
failed before completion. (In <option>-T</option> mode, only the actual
number of transactions is printed.)
The last two lines report the number of transactions per second,
figured with and without counting the time to start database sessions.
The last line reports the number of transactions per second.
</para>
<para>
@ -2257,22 +2258,22 @@ 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
tps = 618.764555 (including connections establishing)
tps = 622.977698 (excluding connections establishing)
latency average = 10.870 ms
latency stddev = 7.341 ms
initial connection time = 30.954 ms
tps = 907.949122 (without initial connection time)
statement latencies in milliseconds:
0.002 \set aid random(1, 100000 * :scale)
0.005 \set bid random(1, 1 * :scale)
0.002 \set tid random(1, 10 * :scale)
0.001 \set delta random(-5000, 5000)
0.326 BEGIN;
0.603 UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;
0.454 SELECT abalance FROM pgbench_accounts WHERE aid = :aid;
5.528 UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;
7.335 UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;
0.371 INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);
1.212 END;
0.001 \set aid random(1, 100000 * :scale)
0.001 \set bid random(1, 1 * :scale)
0.001 \set tid random(1, 10 * :scale)
0.000 \set delta random(-5000, 5000)
0.046 BEGIN;
0.151 UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;
0.107 SELECT abalance FROM pgbench_accounts WHERE aid = :aid;
4.241 UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;
5.245 UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;
0.102 INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);
0.974 END;
</screen>
</para>