On Fri, Jan 20, 2012 at 3:32 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> On Fri, Jan 20, 2012 at 10:16 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
>> On Fri, Jan 20, 2012 at 1:37 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>>> On Sun, Jan 8, 2012 at 9:25 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
>>>> I've taken that idea and used it to build a second Clog cache, known
>>>> as ClogHistory which allows access to the read-only tail of pages in
>>>> the clog. Once a page has been written to for the last time, it will
>>>> be accessed via the ClogHistory Slru in preference to the normal Clog
>>>> Slru. This separates historical accesses by readers from current write
>>>> access by committers. Historical access doesn't force dirty writes,
>>>> nor are commits made to wait when historical access occurs.
>>> This seems to need a rebase.
>> Still applies and compiles cleanly for me.
> D'oh. You're right. Looks like I accidentally tried to apply this to
> the 9.1 sources. Sigh...
No worries. It's Friday.
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
In response to
pgsql-hackers by date
|Next:||From: Robert Haas||Date: 2012-01-20 15:44:28|
|Subject: Re: CLOG contention, part 2|
|Previous:||From: Robert Haas||Date: 2012-01-20 15:37:21|
|Subject: Re: Vacuum rate limit in KBps|