Re: pg_rewarm status - Mailing list pgsql-hackers

From MauMau
Subject Re: pg_rewarm status
Date
Msg-id 10FA5430C28A40F7BBD17E84B98438B6@maumau
Whole thread Raw
In response to Re: pg_rewarm status  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: pg_rewarm status
List pgsql-hackers
From: "Robert Haas" <robertmhaas@gmail.com>
> On Tue, Dec 17, 2013 at 12:09 AM, Amit Kapila <amit.kapila16@gmail.com> 
> wrote:
>> I have used pg_prewarm during some of work related to Buffer Management 
>> and
>> other performance related work. It is quite useful utility.
>> +1 for reviving this patch for 9.4
>
> Any other votes?

+1
Some customers requested:

1. fill the database cache with frequently accessed data before starting or 
resuming service for their users (for the first time or after maintenance 
work), so that they can provide steady and predictable performance.

2. pin some (reference or master) data in the database cache not to be 
evicted from the cache (like Oracle's KEEP buffer?), for the same reason as 
1.

I'd love such useful feature like pg_rewarm to be included in core.  I hope 
such nice features won't be rejected just because there are already similar 
external tools.


Regards
MauMau




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