Re: Increase the size of shared_buffers in AWS RDS 10.11 postgreSQL

Hi,
Ok Sure. But in the parameter group , i can see like this
SUM({DBInstanceClassMemory/12038},-50003) . How to calculate it ? where
should I update it . Should I do change it in 12038 value.

What is meant by DBInstanceClassMemory? My RDS instance shape is "
db.r5.xlarge". I am confused with this parameter?

Can you please help me?

Thanks & Best Wishes,

Ashok

---------------------------------------------------------------------------------------------------------------------

Ashokkumar Mani *(OCP12c/11g/10g/9i, AWS SAA, M103)*

*Dubai** , UAE* *| BLR , INDIA*

M: *+971 54 723 0075 *| *+91 90086 70302 | *WApp :* +91 81975 99922*

W: https://dbatocloudsolution.blogspot.in/
<http://dbatocloudsolution.blogspot.in/> | E: dbatocloud17(at)gmail(dot)com

On Thu, Jan 28, 2021 at 9:44 PM John Scalia <jayknowsunix(at)gmail(dot)com> wrote:

> Well, you should understand the AWS recommends a 75% setting, or 24GB in
> their documentation. So, why don’t you just set the value as something like
> that in your database parameter group settings.
>
>
> Sent from my iPad
>
> On Jan 28, 2021, at 10:55 AM, dbatoCloud Solution <dbatocloud17(at)gmail(dot)com>
> wrote:
>
> 
> Hi John,
> Yes, I calculated as per pgtune(https://pgtune.leopard.in.ua/#/)
> advisor. I took 25% of physical memory 32GB in AWS RDS PostgreSQL which
> is 8GB.
>
> AWS PostgreSQL Configuration: -
>
> <image.png>
>
>
>
> <image.png>
>
>
>
> How to update the shared_buffer into 8GB in the AWS RDS Parameter Group
> here below?
> <image.png>
>
>
>
>
> Thanks & Best Wishes,
>
> Ashok
>
>
>
>
> ---------------------------------------------------------------------------------------------------------------------
>
> Ashokkumar Mani *(OCP12c/11g/10g/9i, AWS SAA, M103)*
>
> *Dubai** , UAE* *| BLR , INDIA*
>
> M: *+971 54 723 0075 *| *+91 90086 70302 | *WApp :* +91 81975 99922*
>
> W: https://dbatocloudsolution.blogspot.in/
> <http://dbatocloudsolution.blogspot.in/> | E: dbatocloud17(at)gmail(dot)com
>
>
> On Thu, Jan 28, 2021 at 6:05 PM dbatoCloud Solution <
> dbatocloud17(at)gmail(dot)com> wrote:
>
>> Hi All,
>>
>> I want to increase the size of shared_buffers in AWS RDS postgreSQL
>> 10.11. When I see it in the DB parameter group in AWS it says
>> "SUM({DBInstanceClassMemory/12038},-50003)" and at the instance level I
>> see 2694408 .
>>
>> Please let me know how to calculate and change the value for 8GB?
>>
>>
>>
>>
>>
>> Thanks & Best Wishes,
>>
>> Ashok
>>
>>
>>
>>
>> ---------------------------------------------------------------------------------------------------------------------
>>
>> Ashokkumar Mani *(OCP12c/11g/10g/9i, AWS SAA, M103)*
>>
>> *Dubai** , UAE* *| BLR , INDIA*
>>
>> M: *+971 54 723 0075 *| *+91 90086 70302 | *WApp :* +91 81975 99922*
>>
>> W: https://dbatocloudsolution.blogspot.in/
>> <http://dbatocloudsolution.blogspot.in/> | E: dbatocloud17(at)gmail(dot)com
>>
>