https://bugs.kde.org/show_bug.cgi?id=384478
Bug ID: 384478
Summary: Extremely slow login into KDE Plasma because of
intense I/O
Product: plasmashell
Version: 5.10.5
Platform: Debian testing
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: k...@davidedmundson.co.uk
Reporter: shm...@mykolab.com
CC: plasma-b...@kde.org
Target Milestone: 1.0
Login into Plasma (from when press "login" button in sddm until plasmashell
panel appears) takes me 1 minute 26 seconds! That's ridiculously slow.
I tried to analyze what's going on, and concluded that it's related to heavy
disk I/O that's happening during login.
I'm using an HDD which is reasonably fast in general (WD Black 2TB) and main
filesystem is XFS. It performs within expected norm in various benchmarks.
Checking what's going on during login, I noticed that mysqld and akonadiserver
take quite a lot of I/O, potentially choking plasmashell and preventing normal
desktop elements from come up sooner (and even some windows from the previous
session like Konsole come up before plasmashell does).
I suppose KDE shouldn't be oriented just to SSDs which allow massive parallel
access, but should perform resonantly well on HDDs too. While I'm planning to
get an SDD, Plasma should be able to handle this better and it's not a proper
solution here.
May be login process should prioritize plasmashell and postpone other
heavyweights like akonadiserver, mysqld and what not, in order for the overall
shell UI to become functional instead of presenting an unloaded desktop?
And 86 seconds until functional desktop - that's just terrible.
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