Re: COMMIT NOWAIT Performance Option
От | Alvaro Herrera |
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Тема | Re: COMMIT NOWAIT Performance Option |
Дата | |
Msg-id | 20070227002053.GT19104@alvh.no-ip.org обсуждение исходный текст |
Ответ на | Re: COMMIT NOWAIT Performance Option ("Simon Riggs" <simon@2ndquadrant.com>) |
Ответы |
Re: COMMIT NOWAIT Performance Option
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Список | pgsql-hackers |
Simon Riggs wrote: > The interesting point is you can have a huge data grinding app, yet with > other tables alongside that hold more important data. In that scenario, > 90% of the data would be COMMIT NOWAIT, whilst the small important data > is safe. Does this means that the regular COMMIT is slower because it has to force more data to disk? I imagine that this isn't the case, because it's not the write itself that's slow; rather, it's the wait until the fsync on WAL is reported complete. However, did you measure this? -- Alvaro Herrera http://www.CommandPrompt.com/ PostgreSQL Replication, Consulting, Custom Development, 24x7 support
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