Re: [PATCHES] Infrastructure changes for recovery
От | Simon Riggs |
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Тема | Re: [PATCHES] Infrastructure changes for recovery |
Дата | |
Msg-id | 1222184541.4445.400.camel@ebony.2ndQuadrant обсуждение исходный текст |
Ответ на | Re: [PATCHES] Infrastructure changes for recovery (Simon Riggs <simon@2ndQuadrant.com>) |
Ответы |
Re: [PATCHES] Infrastructure changes for recovery
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Список | pgsql-hackers |
On Mon, 2008-09-22 at 23:06 +0100, Simon Riggs wrote: > On Thu, 2008-09-18 at 10:09 -0400, Tom Lane wrote: > > Simon Riggs <simon@2ndQuadrant.com> writes: > > > On Thu, 2008-09-18 at 09:06 -0400, Tom Lane wrote: > > >> Do we really need a checkpoint there at all? > > > > > "Timelines only change at shutdown checkpoints". > > > > Hmm. I *think* that that is just a debugging crosscheck rather than a > > critical property. But yeah, it would take some close investigation, > > which maybe isn't warranted if you have a less-invasive solution. > > OK, new patch, version 6. Some major differences to previous patch. > Ready for serious review prior to commit. I will be performing further > testing also. Version 7 I've removed the concept of interrupting a restartpoint half way through, I found a fault there. It was more ugly than the alternative and less robust. The code now waits at the end of recovery if we are in the middle of a restartpoint, but forces a do-it-more-quickly also. That means we won't always get a fast start even though we skip the shutdown checkpoint, but at least we're sure there's no chance of breakage because of concurrent activiy, state changes etc.. I'm happy with this now. -- Simon Riggs www.2ndQuadrant.com PostgreSQL Training, Services and Support
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