Re: Summary and Plan for Hot Standby
От | Simon Riggs |
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Тема | Re: Summary and Plan for Hot Standby |
Дата | |
Msg-id | 1258314219.14054.2608.camel@ebony обсуждение исходный текст |
Ответ на | Re: Summary and Plan for Hot Standby (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>) |
Ответы |
Re: Summary and Plan for Hot Standby
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Список | pgsql-hackers |
On Sun, 2009-11-15 at 21:20 +0200, Heikki Linnakangas wrote: > Simon Riggs wrote: > > On Sun, 2009-11-15 at 20:30 +0200, Heikki Linnakangas wrote: > > > >> The LSN doesn't help there, because when an itemid is marked as dead, > >> the LSN is not updated. > > > > I was thinking we could update the index block LSN without writing WAL > > using the LSN of the heap block that leads to the killed tuple. > > That can be before the cleanup record we write before we start the index > vacuum. Oh well. Strike 1. But the technique sounds OK, we just need to get the LSN of a HeapInfo record from somewhere, say, index metapage. Sounds like we need to do something similar with the xid. -- Simon Riggs www.2ndQuadrant.com
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