shared_buffers on Big RAM systems

[Ron]

Hi,

https://www.postgresql.org/docs/9.6/runtime-config-resource.html
The docs say, "If you have a dedicated database server with 1GB or more of 
RAM, a reasonable starting value for shared_buffers is 25%".

But that's pretty archaic in 2018.  What if the dedicated database server 
has 128GB RAM?

Thanks.

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