Priority Management

Define Priority. Its Principle**

Getting ready

$ vagrant up
$ vagrant ssh

How to do it

From the man pages nice, it run a program with modified scheduling priority.

Setting up nice value to a process

check pid for lunch nice value

$  ps axo nice,pid,comm --sort=-nice
 NI   PID COMMAND
 19   687 khugepaged
  5    25 ksmd
  0     1 systemd
  0     2 kthreadd
  0     3 ksoftirqd/0
  0     6 kworker/u2:0
  -     7 migration/0
  0     8 rcu_bh
  0     9 rcuob/0
  0    10 rcu_sched
  0    11 rcuos/0
  -    12 watchdog/0
  0    14 kdevtmpfs
  0    20 khubd
  0    24 kswapd0
  0    26 fsnotify_mark
  0    81 kauditd
  0   227 scsi_eh_0
  0   230 kworker/u2:2
  0   231 scsi_eh_1
  0   234 scsi_eh_2
  0   358 xfsaild/dm-1
  0   426 systemd-journal
  0   436 lvmetad
  0   450 systemd-udevd
  0   509 xfsaild/sda1
  0   544 firewalld
  0   547 avahi-daemon
  0   548 rsyslogd
  0   552 tuned
  0   553 systemd-logind
  0   554 dbus-daemon
  0   564 agetty
  0   569 avahi-daemon
  0   605 iprinit
  0   606 iprupdate
  0   629 iprdump
  0   698 NetworkManager
  0   771 polkitd
  0  1203 sshd
  0  1930 master
  0  2001 qmgr
  0  2387 dhclient
  0  2402 sshd
  0  2405 sshd
  0  2406 bash
  0 15730 sshd
  0 15733 sshd
  0 15734 bash
  0 15847 su
  0 15851 bash
  0 16019 crond
  0 16173 chronyd
  0 16434 atd
  0 16551 kworker/0:3
  0 16562 pickup
  0 16568 kworker/0:0
  0 16619 kworker/0:1
  0 16621 ps
 -4   513 auditd
-20     5 kworker/0:0H
-20    13 khelper
-20    15 netns
-20    16 writeback
-20    17 kintegrityd
-20    18 bioset
-20    19 kblockd
-20    21 md
-20    27 crypto
-20    36 kthrotld
-20    38 kmpath_rdacd
-20    39 kpsmoused
-20    58 deferwq
-20   223 ata_sff
-20   229 scsi_tmf_0
-20   233 scsi_tmf_1
-20   235 scsi_tmf_2
-20   271 kworker/0:1H
-20   330 kdmflush
-20   331 bioset
-20   338 kdmflush
-20   339 bioset
-20   352 xfsalloc
-20   353 xfs_mru_cache
-20   354 xfslogd
-20   355 xfs-data/dm-1
-20   356 xfs-conv/dm-1
-20   357 xfs-cil/dm-1
-20   505 xfs-data/sda1
-20   506 xfs-conv/sda1
-20   507 xfs-cil/sda1

Now put the nice value

$ nice -n 15 gedit &

How it work

Renice

**Set Renice value with command Line. Its Syntax.