Created attachment 1345468 [details]
Memory and Memory Utilization panels
Description of problem:
In Memory Utilization panel in Hosts dashboard are chart legend items `Buffered` and `cached` in one row. These items should be placed on separated rows. `cached should start with capital letter as the rest of the items.
Memory Utilization panel contains measure `Total Used`. It seems to consist of MemFree+Buffers+Cached from /proc/meminfo. I can not find any definitions for this metric (man free). Maybe it should not be used in the chart if it is no official described metric. It can be confusing for user. This metric can be replaced by MemAvailable from /proc/meminfo.
Name of panel `Memory` should reflect what it shows. Maybe something like `Memory (Free+Cached)`. The most user friendly would by to name it `Memory Available` and place there values representing metric MemAvailable from /proc/meminfo or available from free.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Import cluster with volume into tendrl.
2. Open Grafana and got to `Hosts` dashboard.
3. Check Memory and Memory Utilization panels
What is the 'official' source you are comparing against?
The current implementation done(also there were some changes) by consulting UXD and others(esp the 'Total').
Also I do not Tendrl should 100% adhere to the same stats whuch written in linux man pages. What we currently implemented would suffice with documentation. Please call out if you see incorrect data anywhere.
I am little concerned that for the `Total Used` value is not clear what it represents. There exist some settled terms that are used by linux and I think that these should be reflected there. At first glance I do not know what is difference between `Total Used` and `Used`. To use `Available memory` would be better.
@firstname.lastname@example.org `Available memory` we are already showing in single stat panel.I will remove from the "Total Used" from the graph which is actually creating the confusion.
@email@example.com It would probably be good to remove it because today I got mail from tendrl notifier that memory on my nodes have breched threshold but when I looked on grafana there was cached memory on 50% which is calculated in Total Used. Actual Used was just around 20%.
Created attachment 1355674 [details]
I meant to take qa_contact. Sorry!
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.