Re: Time to up bgwriter_lru_maxpages?

On 2/1/17 4:27 PM, Andres Freund wrote:
> On 2017-02-02 09:22:46 +0900, Michael Paquier wrote:
>> On Thu, Feb 2, 2017 at 9:17 AM, Jim Nasby <Jim.Nasby@bluetreble.com> wrote:
>>> Speaking of which... I have a meeting in 15 minutes to discuss moving to a
>>> server with 4TB of memory. With current limits shared buffers maxes at 16TB,
>>> which isn't all that far in the future. While 16TB of shared buffers might
>>> not be a good idea, it's not going to be terribly long before we start
>>> getting questions about it.
>>
>> Time for int64 GUCs?
>
> I don't think the GUC bit is the hard part.  We'd possibly need some
> trickery (like not storing bufferid in BufferDesc anymore) to avoid
> increasing memory usage.

Before doing that the first thing to look at would be why the limit is 
currently INT_MAX / 2 instead of INT_MAX.
-- 
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
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