[kwlug-disc] Server reboot time ...

[Khalid Baheyeldin]

Anton,

The dmesg command does not keep data across reboots.
It only shows the data from when the last boot was done.

The server has two sets of RAID SSDs, but they should be checked on boot,
not shutting down.

Ron,

Here is what systemd-analyze blame reports.
Not sure if that is across boots, or just the current boot though.

2min 145ms systemd-networkd-wait-online.service
  30.164s apt-daily-upgrade.service
   3.226s motd-news.service
   1.738s fstrim.service
   1.635s munin-node.service
    757ms fwupd-refresh.service
    731ms mysql.service

The ap-daily-upgrade is not something that runs on boot, and
would not block anything.

But the first entry of "wait online" is kind of suspicious.
It may mean that 2 minutes of the current boot is wasted
until the network is up (however that is assessed).

The rest is too low to be relevant.

John Sellens

Great point. I have anecdotally noticed this over the years, but
never got to measuring them, because once the server is live,
the reboots are rare (sometimes we go 500 days without a reboot).

This server is not yet live, so I got curious ...
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