| From: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Alexander Korotkov <aekorotkov(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Andres Freund <andres(at)2ndquadrant(dot)com> |
| Subject: | Re: PinBuffer() no longer makes use of strategy |
| Date: | 2017-03-19 09:02:31 |
| Message-ID: | CANP8+jLzRoL4rRvj918MhK28DjD7b7symaQs6dtYVvZkHN23Vg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 4 February 2017 at 09:33, Andres Freund <andres(at)anarazel(dot)de> wrote:
> For pretty much else that logic seems worse,
> because it essentially prevents any buffers ever staying in s_b when
> only ringbuffer accesses are performed.
That was exactly its intent. The ringbuffer was designed to avoid
cache spoiling by large scans.
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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