Re: pgbench throttling latency limit

From: Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>
To: Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
Cc: Andres Freund <andres(at)2ndquadrant(dot)com>, Rukh Meski <rukh(dot)meski(at)gmail(dot)com>, PostgreSQL Developers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pgbench throttling latency limit
Date: 2014-09-12 19:45:57
Message-ID: 54134D75.4010403@vmware.com
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On 09/12/2014 08:59 PM, Fabien COELHO wrote:
>
>> The output would look something like this (modified from the manual's example
>> by hand, so the numbers don't add up):
>>
>> 0 199 2241 0 1175850568 995598 1020
>> 0 200 2465 0 1175850568 998079 1010
>> 0 201 skipped 1175850569 608 3011
>> 0 202 skipped 1175850569 608 2400
>> 0 203 skipped 1175850569 608 1000
>> 0 204 2513 0 1175850569 608 500
>> 0 205 2038 0 1175850569 2663 500
>
> My 0.02€: ISTM that the number of columns should stay the same whether it
> is skipped or not, so the "file_no" should be kept.

Oh, sorry, I totally agree. I left file_no out by mistake.

> Maybe to keep it a
> number would make sense (-1) or just a sign (-) which means "no value"
> with gnuplot for instance. Or "skipped".
>
> Basically I would be fine with that, but as I do not use the log file
> feature I'm not sure that my opinion should count.
>
> Note that there are also potential issues with the aggregate logging and
> the sampling stuff.

Yep.

- Heikki

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