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--- guides:best-practices [21.06.2022 10:58]
Administrator
+++ guides:best-practices [21.06.2022 12:05] (current)
Administrator
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 Computing server has 32 computing cores. With [Simultaneous Multithreading](https://en.wikipedia.org/wiki/Simultaneous_multithreading) these computing resources are "splitted" to two threads per computing core. So in total the server provides 64 computing threads for usage averaging 2 computing threads per user.
-##
+## Memory
+### How to find out how much memory (RAM) the computing server has.
+Easy way to find out how much usable RAM server has is to use **[free](https://man7.org/linux/man-pages/man1/free.1.html)** terminal command. Example below.
+{{:guides:memory-usage.png?600|}}
+We are using -h parameter with **free** command to request output as human readable format.
+We can see that:
+- the computing server 1 TB of RAM.
+- 211 GB of the available RAM is in use
+- 260 GB of the RAM is free
+- 4.8 GB of the RAM is used (mostly) by the [tmpfs](https://www.kernel.org/doc/Documentation/filesystems/tmpfs.txt) of the kernel.
+- 535 GB buff/cache. These resources are released when the free memory becomes scarce.
+- 784 GB of RAM is available. This is not totally **[accurate](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34e431b0ae398fc54ea69ff85ec700722c9da773)** but gives a good idead at least.
+Other useful commands are:
+cat /proc/memfree
+### How to monitor memory usage

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