Re: pgsql: Include information on buffer usage during planningphase, in EX
От | Julien Rouhaud |
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Тема | Re: pgsql: Include information on buffer usage during planningphase, in EX |
Дата | |
Msg-id | 20200403074347.GA1206@nol обсуждение исходный текст |
Ответ на | Re: pgsql: Include information on buffer usage during planning phase,in EX (Fujii Masao <masao.fujii@oss.nttdata.com>) |
Ответы |
Re: pgsql: Include information on buffer usage during planning phase,in EX
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Список | pgsql-committers |
On Fri, Apr 03, 2020 at 03:24:41PM +0900, Fujii Masao wrote: > > > On 2020/04/03 12:30, Tom Lane wrote: > > Fujii Masao <masao.fujii@oss.nttdata.com> writes: > > > On 2020/04/03 11:58, Michael Paquier wrote: > > > > prion did not like that: > > > > https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=prion&dt=2020-04-03%2002%3A33%3A13 > > > > dory failed as well. The problem is that in text mode, a Buffers line > > won't appear at all if there were zero buffer accesses. I don't think > > we really want to change that, > > Yes. > > > so probably the thing to do is adapt > > the filter functions in explain.sql so that they suppress Buffers lines > > altogether in text output. Kind of annoying, but ... > > I'm thinking to suppress only Buffers line just after Planning Time line, > by applying something like the following changes to explain_filter(). > Thought? +1, that's a better workaround. > > declare > ln text; > + ignore_output boolean; > begin > for ln in execute $1 > loop > + IF ignore_output THEN > + ignore_output := false; > + CONTINUE WHEN (ln ~~ ' Buffers: %'); > + END IF; > + ignore_output := ln ~~ 'Planning Time: %'; > -- Replace any numeric word with just 'N' > ln := regexp_replace(ln, '\m\d+\M', 'N', 'g'); > -- In sort output, the above won't match units-suffixed numbers I'm not sure of what's plpgsql behavior here, but it's probably better to initialize ignore_output to false. Nitpicking, but I think that planning_time_found, or something similar, would be better here.
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