Tuning boot time of my server

From	Markus Grunwald <markus@the-grue.de>
Newsgroups	linux.debian.user
Subject	Tuning boot time of my server
Date	2017-04-08 21:30 +0200
Message-ID	<tu4dz-ZU-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hello,

just for sports, I tried to minimise the boot time of my server, which
is running systemd. I have one mayor blocker:

 % systemd-analyze blame
         10.746s srv-share-backup.mount
         10.258s nfs-kernel-server.service
          3.311s mysql.service
          1.444s apache2.service
          1.344s epgd.service
          1.012s privoxy.service


/srv/share/backup lives on a Western Digital WD RED, and this device
takes ages to spin up. So I'd rather /not/ spin this disk, if it is
not necessary - which it isn't. That's why I've set up an automount
unit for it.
Now I don't understand why it is mounted on booting. /srv/share/backup
is exported via NFS, which might be the reason for the slow
nfs-kernel-server.service. But I have other exports on WD REDs as
well, and they are not mounted while booting.

So why is srv-share-backup.mount started at boot-time? It's not wanted
or directly enabled:

% find /etc/systemd -type l -iname \*.mount
/etc/systemd/system/local-fs.target.requires/-.mount
/etc/systemd/system/local-fs.target.wants/boot.mount
/etc/systemd/system/dev-disk-by\x2duuid-10ad4727\x2d658c\x2d4559\x2d90b3\x2dfd966f8dbf96.device.wants/boot.mount

Can you give me a hint? I've attached the tiny output of
"systemd-analyze plot " for your reference.

--
Markus Grunwald
http://www.the-grue.de/~markus/markus_grunwald.gpg

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Tuning boot time of my server Markus Grunwald <markus@the-grue.de> - 2017-04-08 21:30 +0200
  Re: Tuning boot time of my server Erwan David <erwan@rail.eu.org> - 2017-04-08 21:30 +0200
    Re: Tuning boot time of my server Markus Grunwald <markus@the-grue.de> - 2017-04-08 21:40 +0200
  Re: Tuning boot time of my server Michael Biebl <biebl@debian.org> - 2017-04-08 21:40 +0200

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