Cache Memory Usage

[McRayJ]

I'm running a CentOS server (specs below) with 32 GB memory. My problem is 18.49 GB of the 32GB is used by cache. That seems to be a lot. Is that a good thing or cache is using too much? I'm running a cryptocurrency website. I cache a lot of stuff because I'm using API to pull cryptocurrency prices like the ones on this page: https://www.cryptozink.io/live-cryptocurrency-coins-prices/.

Is cache keeping the site from running out of memory or it's using too much and I should I reduce the number of pages cache? If I don't cache so much, will my the site slows down?

Specs:

OS: CentOS Linux 7.7.1908 (Core)

CPU: Intel(R) Xeon(R) CPU E3-1225 v3 @ 3.20GHz (4 core(s))

PLSK.05980134.0003

System Uptime: 3 day(s) 09:58

Total memory: 31.17 GB

Used: 20.04 GB

Cache: 18.49 GB

 

[jayw1]

Seems fine to me, unused ram is wasted ram.

 

[McRayJ]

Ok, thank you.

 

[Zhenyapan]

it's OK, OS uses cache for make HDD load less.

 

[McRayJ]

it's OK, OS uses cache for make HDD load less.

Thanks