increasing boot speed

[DBelton]

Good point, marko.

The way that systemd starts multiple services at one time now, you might disable a unneeded service but not shave a bit of time off of the total boot time simply because another service is taking longer than it should to start.

[JamesNZ]

Originally Posted by DBelton

Good point, marko.

The way that systemd starts multiple services at one time now, you might disable a unneeded service but not shave a bit of time off of the total boot time simply because another service is taking longer than it should to start.

Could you explain that a bit further? I ask because I've disabled at least 3 services but my boot time has stayed solidly around 32 secs, even though by my calculations Fedora should be booting about 3-5 secs faster

[DBelton]

Say for example, systemd starts 3 services at one time.

A takes 45 seconds, B takes 30 seconds, C takes 15 seconds.

All three services being started takes 45 seconds.

Now, if you disable C, the total time is still 45 seconds, since A is still taking 45 seconds to finish, even though you disabled C which took only 15 seconds.

[stevea]

This command

systemd-analyze plot >/tmp/sysplot.xml ; firefox /tmp/sysplot.xml

will bring up a bar graph of the startup. The portions in red represent processes that are
holding up others from proceeding. Some can be eliminated, some can be made faster,
some cant be improved.

So for example you may be able to drop the fedora-wait-storage.service, but you likely don't
get rid of NetworkManager.

NB the graph seems to be imperfect.

[brandondstaffor]

You can increase the boot speed for Fedora by following these steps. Firstly while booting check which service takes a lot of time to start, you may disable it if not required. Check what timeout value you have in /etc/grub.conf, you may reduce a couple of seconds there. Install and launch system-config-services , stop and disable all the unwanted services. That should certainly help your boot time. You will feel the difference.

[qkurdej]

 5406ms udev-settle.service
  3137ms fedora-storage-init.service
  1603ms fedora-readonly.service
  1581ms boot.mount
  1563ms NetworkManager.service
  1321ms systemd-vconsole-setup.service
  1089ms ip6tables.service
  1031ms systemd-remount-fs.service
  1008ms iptables.service
   812ms avahi-daemon.service
   792ms systemd-logind.service
   732ms udev-trigger.service
   699ms udev.service
   695ms chronyd.service
   593ms media.mount
   587ms dev-mqueue.mount
   583ms dev-hugepages.mount
   547ms livesys.service
   538ms fedora-storage-init-late.service
   529ms sys-kernel-debug.mount

What I don't like is fact, that it takes almost 1 minute for initramfs to start..
Here's my systemd-analyze output:

Startup finished in 880ms (kernel) + 58178ms (initramfs) + 13562ms (userspace) = 72621ms

I'd attach my svg plot from systemd-analyze, but it's too large.
Best regards!

[JamesNZ]

Originally Posted by DBelton

Say for example, systemd starts 3 services at one time.

A takes 45 seconds, B takes 30 seconds, C takes 15 seconds.

All three services being started takes 45 seconds.

Now, if you disable C, the total time is still 45 seconds, since A is still taking 45 seconds to finish, even though you disabled C which took only 15 seconds.

Oh, I see ....