Re: [PATCH] add --throttle option to pgbench
От | Fabien COELHO |
---|---|
Тема | Re: [PATCH] add --throttle option to pgbench |
Дата | |
Msg-id | alpine.DEB.2.02.1304291944460.7344@localhost6.localdomain6 обсуждение исходный текст |
Ответ на | Re: [PATCH] add --throttle option to pgbench (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-hackers |
Hello Tom, > I'm having a hard time understanding the use-case for this feature. > Surely, if pgbench is throttling its transaction rate, you're going > to just end up measuring the throttle rate. Indeed, I do not want to measure the tps if I throttle it. The point is to generate a continuous but not necessarily maximal load, and to test other things under such load such as possiby cascading replication, failover, various dump strategies, whatever. >> I wanted that to test the impact of various load levels, and for >> functionnal tests on my laptop which should not drain the battery. > > How does causing a test to take longer result in reduced battery drain? If I test a replication setup on my laptop at maximum load, I can see the battery draining in a few seconds by looking at the effect on the time left widget. This remark is mostly for functional tests, not for performance test. If I want to test the maximum load of a setup, obviously I will not do that on my laptop, and I will not use --throttle... -- Fabien.
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