By ellfire
I use digitalocean 512 Mb droplet, with centos 6.4, 32bit. I call
top -b -n1
and see that I have only 64Mb of free memory:
Mem: 510888k total, 446184k used, 64704k free, 141832k buffers
OK, I have installed OpenVPN, but it eats only 0.5%, according to ‘top’, the rest is consumed by the system and programs, which were pre-installed.
Well… may be 512Mb is a bare minimum and I should not ask for a lot, but then I create a 1 Gb droplet, with centos 6.4, 64bit, expecting to have additional 512Mb, but… when I call
top -b -n1
I see that there is only 192 Mb of free memory:
Mem: 1020400k total, 827804k used, 192596k free, 24832k buffers
Again, it is a clean system, nothing is running on it yet.
I am also using vps from another provider and the same 1 Gb CentOS 6.4, 64bit gives completely different memory picture:
Mem: 1048576k total, 278932k used, 769644k free, 0k buffers
So, what is wrong with memory usage? Is it possible to do something, to have at least 512 Mb free on a 1Gb droplet?
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Linux uses free memory to cache things. This does not slow things down, and you can still use that RAM. See linuxatemyram.com for a more thorough explanation of what is happening.
What’s the output of this command? <br> <br><pre>free -m</pre> <br> <br>It’s possible that the OS is using free memory for disk caching. <br> <br>See <a href=“http://www.linuxatemyram.com/”>Help! Linux ate my RAM!</a>.
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