> On 1 Jun 2021, at 05:26, Marc Shapiro via Dng <[email protected]> wrote:
>
> I received this e-mail yesterday, and again today:
>
> -----------------------------------------
> exim paniclog /var/log/exim4/paniclog on quixote.home has non-zero size, mail
> system might be broken. The last 10 lines are quoted below.
>
> 2021-05-29 19:35:47 daemon: fork of queue-runner process failed: Cannot
> allocate memory
> -----------------------------------------
>
> I use Thunderbird for all non-local mail.
> I am only using exim for local mail.
> The only mail that I receive locally is a weekly e-mail from a cron job that
> I have set up to do backups, and I did receive that e-mail yesterday, along
> with the above e-mail.
>
> I'm not familiar with the workings of exim, or any MTA, so I don't really
> know what the error message means, other than that there was some memory
> issue. The one clue that I have is that something (I am fairly sure that it
> was a Firefox tab) completely locked my system on Saturday night. Everything
> started slowing down. Mousing became erratic. Then everything completely
> stopped. I couldn't even switch to a terminal where I could kill Firefox. I
> finally had to simply power down the system. (How I hate doing that!) Then
> I rebooted, did a controlled shutdown and rebooted, again. After that,
> everything seems to be running just fine.
>
> Is that likely the cause of the above message? If so, is deleting the
> paniclog the proper way to stop receiving these e-mails?
>
> Marc
>
Next time, before just powering down the system, you should try the Magic SysRq
keyboard shortcuts to see if the kernel is still responding.
https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html
I like to follow the example used on the Wikipedia page which lists the
Alt+SysRq+REISUB keys for doing a safer reboot than simply just hitting the
physical power button. I try to leave a few of seconds at least in between key
presses, to give time for each command to process completely.
https://en.m.wikipedia.org/wiki/Magic_SysRq_key
--
Tom
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