gnome-software uses a very high cpu amount

Confirmed by several users.

It's not really useful assigning the bug to Robert without knowing what went wrong, because there's no information to go on for fixing it.

HOWEVER!

As it happens this just happened on my laptop, and I have a backtrace. It looks like our old friend GMainContext. Hopefully this is enough to go on.

Is there any possibility that the snapd socket closed? I have found a bug in snapd-glib where it continuously reads the socket when it closes.

Not only CPU. It (very) quickly skyrocket RAM memmory usage until system completely slow down and eventually running out of RAM.

I'm running a vanilla installation of artful inside a VirtualBox.
Ubuntu Artful Aardvark (development branch)
Linux vbox 4.12.0-13-generic #14-Ubuntu SMP Sat Sep 2 15:52:55 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
gnome-software 3.26.0-0ubuntu1

If there is something I can test, feel free to ask for (saying how).

  PID User Command Swap USS PSS RSS
 3100 fabio /usr/bin/gnome-software --g 0 55076 56869 81768
 3100 fabio /usr/bin/gnome-software --g 0 55076 56869 81768
 3100 fabio /usr/bin/gnome-software --g 0 135600 137248 162492
 3100 fabio /usr/bin/gnome-software --g 0 261084 262732 287976
 3100 fabio /usr/bin/gnome-software --g 0 376692 378325 403584
 3100 fabio /usr/bin/gnome-software --g 0 685868 687523 712620
 3100 fabio /usr/bin/gnome-software --g 0 830336 831991 857088
 3100 fabio /usr/bin/gnome-software --g 0 1061004 1062692 1087756
 3100 fabio /usr/bin/gnome-software --g 0 1213656 1215344 1240408
 3100 fabio /usr/bin/gnome-software --g 0 1522980 1524668 1549732
 3100 fabio /usr/bin/gnome-software --g 0 1758456 1760121 1784340
 3100 fabio /usr/bin/gnome-software --g 0 2011536 2012984 2036248
 3100 fabio /usr/bin/gnome-software --g 0 2194020 2194121 2198888
 3100 fabio /usr/bin/gnome-software --g 52668 2602192 2602205 2602908
-bash: fork: Não foi possível alocar memória
-bash: fork: Não foi possível alocar memória

It happened again just now. From the trace it looks like it was when I searched for "gedit" in the overview - which has a snap result AFAIK.

Thread 5 (Thread 0x7f1cadf5e700 (LWP 8464)):
#0 0x00007f1cd4318cdd in poll () at ../sysdeps/unix/syscall-template.S:84
#1 0x00007f1cd72ac119 in g_main_context_poll (priority=<optimised out>, n_fds=2, fds=0x7f1ca050f2f0, timeout=<optimised out>, context=0x7f1ca049a910) at ../../../../glib/gmain.c:4187
#2 0x00007f1cd72ac119 in g_main_context_iterate (context=0x7f1ca049a910, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimised out>) at ../../../../glib/gmain.c:3881
#3 0x00007f1cd72ac4b2 in g_main_loop_run (loop=0x7f1ca04395b0) at ../../../../glib/gmain.c:4082
#4 0x00007f1cb04f8b26 in end_sync (data=0x7f1cadf5d8b0, data=0x7f1cadf5d8b0) at snapd-client.c:2446
#5 0x00007f1cb04f8b26 in snapd_client_find_section_sync (client=0x55a0f05ef960 [SnapdClient], flags=flags@entry=SNAPD_FIND_FLAGS_NONE, section=section@entry=0x0, query=query@entry=0x7f1ca061edd0 "ged", suggested_currency=suggested_currency@entry=0x0, cancellable=cancellable@entry=0x55a0f066d840 [GCancellable], error=0x7f1cadf5d9d8) at snapd-client.c:3798
#6 0x00007f1cb071424f in find_snaps (plugin=plugin@entry=0x55a0f06051d0 [GsPlugin], flags=flags@entry=SNAPD_FIND_FLAGS_NONE, section=section@entry=0x0, query=query@entry=0x7f1ca061edd0 "ged", cancellable=0x55a0f066d840 [GCancellable], error=error@entry=0x7f1cadf5d9d8) at ../plugins/snap/gs-plugin-snap.c:231
#7 0x00007f1cb0714e40 in gs_plugin_add_search (plugin=0x55a0f06051d0 [GsPlugin], values=<optimised out>, list=0x55a0f2536d00 [GsAppList], cancellable=<optimised out>, error=0x7f1cadf5d9d8)
    at ../plugins/snap/gs-plugin-snap.c:505
#8 0x000055a0ef18d7cf in gs_plugin_loader_call_vfunc (helper=helper@entry=0x55a0f0ffe300, plugin=plugin@entry=0x55a0f06051d0 [GsPlugin], app=app@entry=0x0, list=0x55a0f2536d00 [GsAppList],
    list@entry=0x0, cancellable=cancellable@entry=0x55a0f066d840 [GCancellable], error=error@entry=0x7f1cadf5dae8) at ../lib/gs-plugin-loader.c:657
#9 0x000055a0ef18db1d in gs_plugin_loader_run_results (helper=helper@entry=0x55a0f0ffe300, cancellable=cancellable@entry=0x55a0f066d840 [GCancellable], error=error@entry=0x7f1cadf5dae8) at ../lib/gs-plugin-loader.c:1083
#10 0x000055a0ef18f32a in gs_plugin_loader_process_thread_cb (task=0x7f1ca0006ab0 [GTask], object=0x7f1cbc004320, task_data=0x55a0f0ffe300, cancellable=0x55a0f066d840 [GCancellable]) at ../lib/gs-plugin-loader.c:3054
#11 0x00007f1cd6f52b76 in g_task_thread_pool_thread (thread_data=0x7f1ca0006ab0, pool_data=<optimised out>) at ../../../../gio/gtask.c:1328
#12 0x00007f1cd72d3ff0 in g_thread_pool_thread_proxy (data=<optimised out>) at ../../../../glib/gthreadpool.c:307
#13 0x00007f1cd72d3625 in g_thread_proxy (data=0x55a0f05e8a80) at ../../../../glib/gthread.c:784
#14 0x00007f1cd45e874a in start_thread (arg=0x7f1cadf5e700) at pthread_create.c:456
#15 0x00007f1cd4324caf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

● snapd.service - Snappy daemon
   Loaded: loaded (/lib/systemd/system/snapd.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2017-09-19 09:13:12 BST...

https://www.facebook.com/groups/GNU.Linux.deb.ua/permalink/1213411782124847/

I have the same problem. Tell me how to decide? This problem arose after I left my computer on for 3 days.

SSD Kingston V300 60Gb. Dell Optiplex 755

This happend to me _three_ times in the last week, gnome-software runs amok and takes up 16GB ram + 16GB Swap and managed to write a 13.7GB-14.3GB syslog. Couldn't view the syslogs, but there is a comment in another bug-thread on the same issue with info from syslog: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1616332/comments/12

For now i have uninstalled gnome-software, that fixes the problem...