| From: | Kasahara Tatsuhito <kasahara(dot)tatsuhito(at)gmail(dot)com> |
|---|---|
| To: | Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com> |
| Cc: | Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, Masahiko Sawada <masahiko(dot)sawada(at)2ndquadrant(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Tid scan increments value of pg_stat_all_tables.seq_scan. (but not seq_tup_read) |
| Date: | 2020-02-07 08:28:43 |
| Message-ID: | CAP0=ZVJRAwbn3UdqGPtcONU1xDeeES8KR2kG1JsznSHsFKK-Sg@mail.gmail.com |
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| Lists: | pgsql-hackers |
Hi,
On Fri, Feb 7, 2020 at 5:02 PM Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com> wrote:
> BTW, commit 147e3722f7 causing the issue changed currtid_byreloid()
> and currtid_byrelname() so that they also call table_beginscan().
> I'm not sure what those functions are, but probably we should fix them
> so that table_beginscan_tid() is called instead. Thought?
+1, sorry, I overlooked it.
Both functions are used to check whether a valid tid or not with a
relation name (or oid),
and both perform a tid scan internally.
So, these functions should call table_beginscan_tid().
Perhaps unnecessary, I will attach a patch.
Best regards,
--
Tatsuhito Kasahara
kasahara.tatsuhito _at_ gmail.com
| Attachment | Content-Type | Size |
|---|---|---|
| fix_tidscan_issues_v6.patch | application/octet-stream | 4.5 KB |
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