Re: Big 7.4 items
От | Shridhar Daithankar |
---|---|
Тема | Re: Big 7.4 items |
Дата | |
Msg-id | 3DFB2C6B.20174.5BB56A@localhost обсуждение исходный текст |
Ответ на | Re: Big 7.4 items (Justin Clift <justin@postgresql.org>) |
Список | pgsql-hackers |
On 14 Dec 2002 at 18:02, Justin Clift wrote: > For PITR-log-based-replication, how much data would be required to be pushed out to each slave system in order to bring > it up to date? > > I'm having visions of a 16MB WAL file being pushed out to slave systems in order to update them with a few rows of data... I was under impression that data is pushed to slave after a checkpoint is complete. i.e. 16MB of WAL file has recycled. Conversely a slave would contain accurate data upto last WAL checkpoint. I think tunable WAL size should be of some help in such scenario. Otherwise the system designer has to use async. replication. for granularity upto a transaction. ByeShridhar -- Conference, n.: A special meeting in which the boss gathers subordinates to hear what they have to say, so long as it doesn't conflict with what he's already decided to do.
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