| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> |
| Cc: | Tatsuo Ishii <ishii(at)postgresql(dot)org>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pgbench --latency-limit option |
| Date: | 2015-12-23 15:44:39 |
| Message-ID: | CA+TgmoaOTopo74O7UkvJE6uyJknj3jApZ27cj+6r9g09N-LDDQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Dec 23, 2015 at 9:52 AM, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> wrote:
>> In your example, you've got 10 connections and are trying to run at 2
>> tps, so to avoid having to start skipping things you need transaction
>> response times to be <~ 5 ms. The actual response time is ~5.5ms, so
>> if you ran the test for longer I think you would see some skips.
>
> Probably no skips though, because the response time needed is below 5
> *seconds*, not ms : 2 tps on 10 connections, 1 transaction every 5 seconds
> for each connection.
Oops. Right. But why did this test only run 16 transactions in total
instead of 20?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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