Re: Parameter value from (mb/gb) to bytes

[Thomas Kellerer]

Raul Kaubi schrieb am 14.10.2020 um 12:22:
> Is there a simple way to dynamically get for example parameter
> „shared buffers“ value (megabytes or gigabytes) to bytes, for
> monitoring perspective..?>
>  
>
> At the moment, this gives me value in GB.
>
> # psql -U postgres -Atc "show shared_buffers;"
> 1GB
>
> This value may as well be in MB. So I am looking a way to dynamically get the 
> value in bytes.

Instead of using "show" you can use a SELECT with pg_size_bytes():

  select pg_size_bytes(setting)
  from pg_settings
  where name = 'shared_buffers';