Glances and Homepage : high CPU usage when 2 or more widgets

[lokiiiii]

Hello everyone,
My glances and homepage are both up-to-date docker versions and when I declare one glances widget in homepage, the glances' python3 process is ok at around 7% cpu but as soon as I declare two or more widgets, python3 process is around 150% and can even go as high as 600% sometimes...
I already opened a ticket on homepage's side and it seems that this issue may be related with multiple API calls to glances.
Is anyone experiencing the same ?
Thanks

[nicolargo]

Hello @lokiiiii

what those plugins do ?

For the moment, there is no rate control on the Glances API, so if a client asks for stats several time per second than the Glances server try to answer by consuming more CPU cycle.

[lokiiiii]

the plugins that I use are: current cpu usage, top 5 most consumming processes, top 5 most consumming docker containers, RAM usage.
I tried to tweak the widgets with a "refreshInterval: 5000" (=5s) but still the same (well, now my CPU is fine for 4s and then it goes up to around 150% once again every 5s).
I saw your second reply and I switched to the dev branch but still the same every 5s.

[lokiiiii]

PS : I tried several widgets but it seems that the widgets themselves are not the cause : if I set only the CPU usage widget, it works fine, same for top5 processes, if it's the only one set, it's OK also, but as soon as I set at least 2 widgets, it grows to around 150% and can even grow to 600% sometimes (but it's rare hopefully)

[nicolargo]

Are you sure that you dowload the latest dev or ubuntu-dev Docker image version ?

[lokiiiii]

I updated my docker-compose with the dev tag and I pushed it after your message :

[lokiiiii]

after a few days checking different topics found on the net / reddit / etc.. I still didn't find any solution to this high cpu usage.
is there a way to get more logs like a verbose mode or something to understand why 2 or more API calls at the same time will make my cpu work wayyy more than only one API call ?
I tried to check inside my container but couldn't find relevant details..
for now, I changed my homepage configuration to refresh the widgets with a 5s interval so it happens less often.
Thanks

[nicolargo]

Just implement a basic TTL (set to 1 second) for the API cache in the develop branch of Glances: #3202