Restart systemd service based on memory usage

[Richard Shaw]

I have a Kiosk I'm trying out using Chromium, unfortunately it seems to
have a memory leak and crashes in less than 24 hours of usage.

I see systemD has an option for "MemoryMax" but was wondering if anyone has
actually used it?

Is it as simple as
MemoryMax=512M
OnFailure=Restart

or something like that?

Thanks,
Richard

[Ed Greshko]

On 23/07/2021 03:00, Richard Shaw wrote:
> I have a Kiosk I'm trying out using Chromium, unfortunately it seems to have a memory leak and crashes in less than 24 hours of usage.
>
> I see systemD has an option for "MemoryMax" but was wondering if anyone has actually used it?
>
> Is it as simple as
> MemoryMax=512M
> OnFailure=Restart
>
> or something like that?

Is Chromium started by a systemd unit/service?

[Richard Shaw]

On Thu, Jul 22, 2021 at 2:41 PM Ed Greshko  wrote:
> On 23/07/2021 03:00, Richard Shaw wrote:
> > I have a Kiosk I'm trying out using Chromium, unfortunately it seems to
>
> have a memory leak and crashes in less than 24 hours of usage.
> > I see systemD has an option for "MemoryMax" but was wondering if anyone
>
> has actually used it?
> > Is it as simple as
> > MemoryMax=512M
> > OnFailure=Restart
> >
> > or something like that?
>
> Is Chromium started by a systemd unit/service?

Not yet, but it will be :)

I'm loosely following this:

https://pimylifeup.com/raspberry-pi-kiosk/

Thanks,
Richard

[Ed Greshko]

On 23/07/2021 04:22, Richard Shaw wrote:
> On Thu, Jul 22, 2021 at 2:41 PM Ed Greshko <[e-mail] > wrote:
> On 23/07/2021 03:00, Richard Shaw wrote:
> > I have a Kiosk I'm trying out using Chromium, unfortunately it seems to have a memory leak and crashes in less than 24 hours of usage.
> >
> > I see systemD has an option for "MemoryMax" but was wondering if anyone has actually used it?
> >
> > Is it as simple as
> > MemoryMax=512M
> > OnFailure=Restart
> >
> > or something like that?
> >
>
> Is Chromium started by a systemd unit/service?
>
>
> Not yet, but it will be :)
>
> I'm loosely following this:
>
> https://pimylifeup.com/raspberry-pi-kiosk/ https://pimylifeup.com/raspberry-pi-kiosk/

Check out https://www.freedesktop.org/software/systemd/man/systemd.resource-control.ht...
and both MemoryMax MemoryHigh.

FWIW, all of my limited knowledge of systemd comes from [e-mail].

They have been nothing but helpful in sorting out my questions.

[Barry]

> On 22 Jul 2021, at 20:01, Richard Shaw  wrote:
>
> 
> I have a Kiosk I'm trying out using Chromium, unfortunately it seems to have a memory leak and crashes in less than 24 hours of usage.

It likely that the problem is not a bug in chromium but rather the javascript that has
been run on the pages that where loaded. Tricks to cache images in memory and
other stuff that javascript code does leads to ever increasing memory foot print.
> I see systemD has an option for "MemoryMax" but was wondering if anyone has actually used it?
>
> Is it as simple as 
> MemoryMax=512M
> OnFailure=Restart
>
> or something like that?

I used to work on a embedded system that had a web browser, WebKit based,
and it had to be limited with control groups as well.

What we did, I recall, is limit swap and memory for the slice that the browser ran in.
Also we configured the slice to set oom killer parameters.
If you do not do this you risk the oom killer killing the wrong process.

Have done this then oom killer will kill the process and systemd will restart it.

Barry
> Thanks,
> Richard
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