Re: Online base backup from the hot-standby
| От | Simon Riggs |
|---|---|
| Тема | Re: Online base backup from the hot-standby |
| Дата | |
| Msg-id | CA+U5nM+h-Kty2HDOntn5Om+XU_0N5ZN5uvXzSR0YXnzrEUBwQw@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Online base backup from the hot-standby (Simon Riggs <simon@2ndQuadrant.com>) |
| Ответы |
Re: Online base backup from the hot-standby
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| Список | pgsql-hackers |
On Wed, Jan 25, 2012 at 8:49 AM, Simon Riggs <simon@2ndquadrant.com> wrote: > On Wed, Jan 25, 2012 at 8:16 AM, Fujii Masao <masao.fujii@gmail.com> wrote: > >>> What happens if we shutdown the WALwriter and then issue SIGHUP? >> >> SIGHUP doesn't affect full_page_writes in that case. Oh, you are concerned about >> the case where smart shutdown kills walwriter but some backends are >> still running? >> Currently SIGHUP affects full_page_writes and running backends use the changed >> new value of full_page_writes. But in the patch, SIGHUP doesn't affect... >> >> To address the problem, we should either postpone the shutdown of walwriter >> until all backends have gone away, or leave the update of full_page_writes to >> checkpointer process instead of walwriter. Thought? > > checkpointer seems the correct place to me Done. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
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