ETCd IO Niceness

[mhkarimi1383]

What would you like to be added

IO niceness to the ETCd daemon equivalent to

ionice -c2 -n0 -p `pgrep etcd`

(I'm using SystemD setup)

Why is this needed

In my cluster I got a bit slowness on API Server, after setting Niceness for the ETCd process performance doubled

Tested with

ionice -c2 -n0 -p `pgrep etcd`

(According to https://etcd.io/docs/v3.4/tuning/)

and performance test of etcdctl

Running On a QEMU (PVE) based VM with IO Thread enabled and Disk cache Disabled

with 4 Cores of CPU (2 Cores and 2 Sockets)
and 16GB of RAM