linode and swap

Question

Swap

Recently migrated one project from AWS to linode.com. In the course of using their servers, I had a feeling, backed up by facts, that if the system starts using swap (even if by some small percentages), I / O immediately jumps beyond the reasonable, everything starts to go dumb. For myself, I solved this by completely disabling swap (well, adding memory), but I would like to know if there are other solutions, or is there really a disk subsystem that is such a bottleneck
PS I understand that swap is bad, but so on server performance it hasn't affected me yet.
PPS I use the standard ubuntu from their defaults.

Answer 1

I once met a problem with new disks with 4k formatting, if the alignment is wrong, then any good load on the disk outputs up to 100 percent in io.
As a result changed screws on the server.
I met this problem with keyweb.
Lay out the screw model, you can see it in parted / dev / sda