| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | torikoshia <torikoshia(at)oss(dot)nttdata(dot)com> |
| Cc: | Julien Rouhaud <rjuju123(at)gmail(dot)com>, James Coleman <jtc331(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers(at)lists(dot)postgresql(dot)org, Étienne BERSAC <etienne(dot)bersac(at)dalibo(dot)com>, ashutosh(dot)bapat(dot)oss(at)gmail(dot)com, rafaelthca(at)gmail(dot)com, jian(dot)universality(at)gmail(dot)com |
| Subject: | Re: RFC: Logging plan of the running query |
| Date: | 2024-02-28 06:18:32 |
| Message-ID: | CA+TgmoYC3_KG8i1WfwGKK6+3YAS7Z0wP0gaTUC4ggEQ=1DrEEg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Feb 26, 2024 at 5:31 PM torikoshia <torikoshia(at)oss(dot)nttdata(dot)com> wrote:
> It would be nice if there was a place accessed once every few seconds or
> so..
I think this comment earlier from Andres deserves close attention:
# If we went with something like tht approach, I think we'd have to do something
# like redirecting node->ExecProcNode to a wrapper, presumably from within a
# CFI. That wrapper could then implement the explain support, without slowing
# down the normal execution path.
If this is correctly implemented, the overhead in the case where the
feature isn't used should be essentially zero, I believe.
--
Robert Haas
EDB: http://www.enterprisedb.com
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