Bug 441093

Summary: Feature: average queue size sensor for disks
Product: [Frameworks and Libraries] ksystemstats Reporter: Tobias Brohl <tobrohl>
Component: GeneralAssignee: Plasma Bugs List <plasma-bugs-null>
Status: REPORTED ---    
Severity: wishlist CC: ahiemstra, kde, plasma-bugs-null, the.9a3eedi
Priority: LO    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Tobias Brohl 2021-08-17 19:09:17 UTC 
The average queue size is a good metric for how much a disk is working at any given time. It is a better metric then the Read- and Write rates, as those fail to take into account that reading 100MB sequentially is keeping a disk much less busy than reading 100MB of random 4k blocks. If a user wants to know how busy his (hard) disk currently is, the avereage queue size is the most meaningful metric.

Therefore I propose that plasma-systemmonitor should offer a sensor for this metric for every physical disk. A possible source of data would be iostat (which labels is as aqu-sz)
Comment 1 Mohammed Khoory 2023-08-24 14:14:31 UTC 
I would like to second this. I've recently moved to Plasma from Windows and this is a very useful metric to have particularly for magnetic disks.