Why doesn't PostgreSQL eat more memory?

Question

PostgreSQL

Good day to all!
I have an instance specially for PostgreSQL raised .. but he does not want to eat more (the total memory is occupied about 6%, this is with OS).
The config is as follows:
max_connections = 200
shared_buffers = 2GB
effective_cache_size = 5GB
work_mem = 10MB
maintenance_work_mem = 448MB
min_wal_size = 1GB
max_wal_size = 2GB
checkpoint_completion_target = 0.7
wal_buffers = 16MB
default_statistics_target = 100
RAM: 8GB
PS
SHOW ALL - shows modified data config loads fine

Answer 1

Apparently he doesn't need more.
How big is the table, how many queries, how complex?
See EXPLAIN (ANALYZE,BUFFERS)
Well, shared_buffers can be raised up to 4-6 GB.

Answer 2

Here is an important point, what kind of database do you have and how is it currently used.
Those. if the application used by this database is a simple accounting system with a minimum of functionality that is visited once a quarter, then everything is ok. If the application is more complicated and is used often, and there are quite a few people working there in parallel, then, most likely, everything is also ok, but here I would advise you to install a DBA beer that worked with requests and would suggest that it continue in the same spirit.