Bug 1556872

Summary:	iostat %wrqm coloring misleading
Product:	[Fedora] Fedora	Reporter:	Jeremy Harris <jeharris>
Component:	sysstat	Assignee:	Michal Sekletar <msekleta>
Status:	CLOSED EOL	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	unspecified
Version:	27	CC:	kasal
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
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Clone Of:		Environment:
Last Closed:	2018-11-30 22:06:16 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Jeremy Harris 2018-03-15 12:04:37 UTC

Description of problem:

 "iostat -dxz 10" output, in the %wrqm column, colours high percentages with an "attention" colour
(it's pink or red on my light-background xterm).  Low values are blue.  I'm seeing this on a
swap disk, but it likely applies to any usage of a disk.

The attention-marking is misleading: a number approaching 100% is not at all a bad thing -
in fact it's _good_ that the system can reduce the number of IOPS by merging sequences.
It's far from clear that any range of values in this field can be considered as either
acceptable or bad.  As an example, I've seen %wrqm at 70+ while %util is < 6.

Both %wrqm and %rrqm do this.


Version-Release number of selected component (if applicable):
  sysstat-11.5.7-4.fc27.x86_64


How reproducible:
  100% given a suitable I/O load


Steps to Reproduce:
1. Push the system into active paging
2. iostat -dxz 10


Actual results:
  Redness

Expected results:
  No redness.

Comment 1 Peter Schiffer 2018-03-26 12:50:57 UTC

Upstream issue: https://github.com/sysstat/sysstat/issues/177

Comment 2 Peter Schiffer 2018-04-04 15:37:31 UTC

Hi Jeremy,

so according to the https://github.com/sysstat/sysstat/issues/177#issuecomment-376277794 this is by design.

peter

Comment 3 Jeremy Harris 2018-04-04 15:50:32 UTC

That is a foolish position to take, IMHO.

If that really was the case then he should not use what is traditionally
reserved, at least in Western cultures, as a colour indicating DANGER
(deliberate emphasis).  For any of the columns.

Comment 4 Ben Cotton 2018-11-27 15:04:18 UTC

This message is a reminder that Fedora 27 is nearing its end of life.
On 2018-Nov-30  Fedora will stop maintaining and issuing updates for
Fedora 27. It is Fedora's policy to close all bug reports from releases
that are no longer maintained. At that time this bug will be closed as
EOL if it remains open with a Fedora  'version' of '27'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not 
able to fix it before Fedora 27 is end of life. If you would still like 
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version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's 
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Comment 5 Ben Cotton 2018-11-30 22:06:16 UTC

Fedora 27 changed to end-of-life (EOL) status on 2018-11-30. Fedora 27 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
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current release. If you experience problems, please add a comment to this
bug.

Thank you for reporting this bug and we are sorry it could not be fixed.