How much free memory should I have on my hosting server?

Dr. McKay

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I have several dedicated server and VPS, normally I have 40% free RAM for my websites running on a server. Is that good and acceptable for number of percentage free RAM on a server? According to you, how much free memory should I have on my server? and why?
 

Dr. McKay

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But less free ram can cause slow loading for websites on that server?
 

WSCallum

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WSCallum
Not necessarily, it all depends on what the RAM is being used for. A lot of it will be caching so if the RAM is required, it'll be freed up as and when needed. Most websites will not use that much RAM at all realistically, most data is grabbed from disks so will use more CPU power/disk reads and writes. 40% free RAM is more than adequate.
 

Adam Stokes

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I have several dedicated server and VPS, normally I have 40% free RAM for my websites running on a server. Is that good and acceptable for number of percentage free RAM on a server? According to you, how much free memory should I have on my server? and why?
I think 40% free RAM is fine. Now let me ans your question about how much free memory you should have on a hosting server well that all depends upon the quality & efficiency of the sites you have installed on hosting server.
 

ITivan80

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To run everything smoothly it should 16 GB of RAM or above.
 

isix

Isix Hosting Services
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According to you, how much free memory should I have on my server? and why?
All depends on the content and applications running on the server. E.g. it's not a problem to run Centos+Wordpress on a VPS with 2 GB RAM and 1 vCore for a small blog site.
 

tuxandrew

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I have several dedicated server and VPS, normally I have 40% free RAM for my websites running on a server. Is that good and acceptable for number of percentage free RAM on a server? According to you, how much free memory should I have on my server? and why?
It all depends on how much traffic you are expected and also based on any fluctauting resource usage at on and off peak hours of your servers.

Yes, it sounds good to see 40% of free memory available at normal or off peak hours.
But the cases will differ according to the website traffic, on peak hours with unexpected /heavy incoming traffic, the server should require more resource than normal.

- In that situations the server cannot process more request if the system is in shortage of hardware resources like memory , CPU as well.

- There should be a through audit done for the servers or a trail 'n' error sessions should be done for any websites /code expecting high traffic, for any resource usage , do an optimize with the code, in order to test the resource usage before running the server into the production.
 
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