Skip site navigation (1) Skip section navigation (2)

Re: 2nd Level Buffer Cache

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Jim Nasby <jim(at)nasby(dot)net>
Cc: Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, rsmogura <rsmogura(at)softperience(dot)eu>, PG Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: 2nd Level Buffer Cache
Date: 2011-03-18 21:13:43
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On Fri, Mar 18, 2011 at 2:15 PM, Jim Nasby <jim(at)nasby(dot)net> wrote:
> +1
> To take the opposite approach... has anyone looked at having the OS just manage all caching for us? Something like MMAPed shared buffers? Even if we find the issue with large shared buffers, we still can't dedicate serious amounts of memory to them because of work_mem issues. Granted, that's something else on the TODO list, but it really seems like we're re-inventing the wheels that the OS has already created here...

The problem is that the OS doesn't offer any mechanism that would
allow us to obey the WAL-before-data rule.

Robert Haas
The Enterprise PostgreSQL Company

In response to

pgsql-hackers by date

Next:From: Robert HaasDate: 2011-03-18 21:18:28
Subject: Re: Re: [COMMITTERS] pgsql: Efficient transaction-controlled synchronous replication.
Previous:From: Robert HaasDate: 2011-03-18 21:12:22
Subject: sync rep & fsync=off

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group