Postgres Pro
Downloads
Home   >   mailing lists

Re: crash-safe visibility map, take three - Mailing list pgsql-hackers

From Jim Nasby
Subject Re: crash-safe visibility map, take three
Date
Msg-id CCE55EDE-8354-4E2B-A815-E5A29018D33F@nasby.net
Whole thread Raw
In response to Re: crash-safe visibility map, take three  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: crash-safe visibility map, take three  (Robert Haas <robertmhaas@gmail.com>)
List pgsql-hackers
Tree view 
On Dec 1, 2010, at 2:59 PM, Robert Haas wrote:
> 2. Hint bits are necessary because an old XID can't be viewed as
> guaranteed committed.

Hmm... I thought hint bits were necessary because it's too expensive to query CLOG for every tuple. If my understanding
iscorrect then if we fix the CLOG performance issue we don't need hint bits anymore. 
--
Jim C. Nasby, Database Architect                   jim@nasby.net
512.569.9461 (cell)                         http://jim.nasby.net

pgsql-hackers by date:

Previous
From: Greg Smith
Date:
Subject: Re: We really ought to do something about O_DIRECT and data=journalled on ext4
Next
From: Jim Nasby
Date:
Subject: Re: improving foreign key locks