Re: Page replacement algorithm in buffer cache - Mailing list pgsql-hackers

From Merlin Moncure
Subject Re: Page replacement algorithm in buffer cache
Date
Msg-id CAHyXU0xMFvr2eiR+2Lv=dj+UON+muei_pjbUP2BMetiR-UTASw@mail.gmail.com
Whole thread Raw
In response to Re: Page replacement algorithm in buffer cache  (Atri Sharma <atri.jiit@gmail.com>)
Responses Re: Page replacement algorithm in buffer cache  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
On Fri, Mar 22, 2013 at 1:13 PM, Atri Sharma <atri.jiit@gmail.com> wrote:
> On Fri, Mar 22, 2013 at 11:36 PM, Greg Stark <stark@mit.edu> wrote:
>> On Fri, Mar 22, 2013 at 2:02 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>> And we definitely looked at ARC
>>
>> We didn't just look at it. At least one release used it. Then patent
>> issues were raised (and I think the implementation had some contention
>> problems).
>>
>>
>> --
>> greg
>
> What is the general thinking? Is it time to start testing again and
> thinking about improvements to the current algorithm?

well, what problem are you trying to solve exactly?  the main problems
I see today are not so much in terms of page replacement but spinlock
and lwlock contention.

merlin



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