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Too Much Cache Memory

Hello linuxers,

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 Use:**** 18.49 GB

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