On 19/12/17 03:36, stan wrote:
On Mon, 18 Dec 2017 16:49:47 +1030
Stephen Davies <sdavies@xxxxxxxxxx> wrote:
I upgraded from F25 to F26 yesterday and ever since have been seeing
the system frequently become totally unresponsive.
[snip]
The only clue that I have seen is that top often shows very high wait
I/O levels and swap space is sometimes (but not always) low.
Check your memory. Does top show the amount of memory that you
expect? What's using all that memory? Swap should be empty or close
all the time if the system has enough memory. Is there a background
task that is using a lot of CPU? The locate database program can use a
lot of IO as it scans the disk for things.
You could check the logs for messages about kernel errors because of
hardware (journalctl) and run the memory checker to be sure your memory
is OK. My /boot shows two, memtest86+-5.01 and elf-memtest86+-5.01.
Nothing has changed in the system workload or configuration.
Sure sounds like a hardware issue showed up. Try cleaning the case,
and reseating the memory and connectors.
Temlakos makes good points about the hard drive, too. All the new
writes during upgrade could have brought out issues.
It seems to have something to do with graphic apps such as Thunderbird
and Firefox.
After restarting yet again yesterday afternoon, I left the box alone.
Did not even log into KDE on the console but did all my work from either
an Android tablet or a laptop using network access to the server only
when necessary.
No failures for 24 hours.
Just now I started using Thunderbird on the laptop (also F26) and almost
immediately started to see huge wait IO levels and lack or response.
Prior to starting TB, all was well.
Does this suggest anything?
Cheers,
Stephen
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