Bioinformatics Center

User Tools

Site Tools

You are here: home » guides » best-practices
guides:best-practices

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
guides:best-practices [21.06.2022 10:53]
Administrator 		guides:best-practices [21.06.2022 12:05] (current)
Administrator
Line 16: Line 16:
 1024 GB of **RAM** is shared between the all users on the computing environment and usually there are around 30 users concurrently. Averaging this is around **34** GB of RAM per user. 1024 GB of **RAM** is shared between the all users on the computing environment and usually there are around 30 users concurrently. Averaging this is around **34** GB of RAM per user.
  
-Computing server has 32 computing cores. With [Simultaneous Multithreading](https://en.wikipedia.org/wiki/Simultaneous_multithreading) these computing cores are "splitted" to two threads per computing cores. So in total the server provides 64 computing threads for usage averaging 2 computing threads per user.+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.
  
-Usually on the environment there are few power-user who +## 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
  
  
guides/best-practices.1655798028.txt.gz · Last modified: 21.06.2022 10:53 by Administrator

Page Tools