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In our cluster, both the server and worker had been gone to swap and the performance is extremely slow. Although currently the memory is free but I don't know why the in the swap area is still being there and ubuntu doesn't move them to the memory and empty the swap.
On the other hand, when I run
Code:
sudo swapoff -a
on the server it says:
Code:
mahmood@server:~$ sudo swapoff -a
[sudo] password for mahmood:
swapoff: /dev/sda1: swapoff failed: Cannot allocate memory
.....and ubuntu doesn't move them to the memory and empty the swap.
If the amount of (free) physical memory is less then the amount occupied by swap, then you cannot turn off swap.
Quote:
In our cluster, both the server and worker had been gone to swap and the performance is extremely slow.
Turning off swap won't solve this problem, it will probably make it worse. Without any extra info it looks like your machine tries to allocate more resources then it has available.
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