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[Jonathan Greenblatt <1316830@xxxxxxxxxxxxxxxxxx>]

I figured it out by attaching to the process with gdb and doing a
backtrace. Apparently my wtmp and btmp files got full from devices doing
remote logins on a regular basis. I became suspicious that there was
something particular to what I was doing based on how few people were
affected by this. Here is the size of my files:

-rw-rw---- 1 root utmp   7160832 Nov 24 21:23 /var/log/btmp
-rw-rw-r-- 1 root utmp 116148480 Nov 25 22:39 /var/log/wtmp

I need to have a cleanup job for these files anyway illregardless of
what the accounts-daemon does but it may help if the accounts-deamon
does not process the while file if possible. I have not looked into what
accounts-deamon does with the files so I am not sure if it is feasable
just to look at the end of the files instead of the whole file.

Even with truncating the files accounts-deamon seems to be too much of a
busy body but for now at least the %CPU is below 1% on average but I do
see it peak at times to 10%. The polkitd now shows up at the top more
than accounts-deamon, from the threads on this I beleive that deamon is
part of the same processing.

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https://bugs.launchpad.net/bugs/1316830

Title:
  /usr/lib/accountsservice/accounts-daemon :: memory and CPU time leak

Status in “accountsservice” package in Ubuntu:
  Confirmed

Bug description:
  
  netikras@netikras-netbook ~/received/accountsservice-0.6.20 $ cat /etc/lsb-release 
  DISTRIB_ID=LinuxMint
  DISTRIB_RELEASE=16
  DISTRIB_CODENAME=petra
  DISTRIB_DESCRIPTION="Linux Mint 16 Petra"

  uname -a
  Linux netikras-netbook 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:12:00 UTC 2013 i686 i686 i686 GNU/Linux


  
  Nothing. Using my netbook as usual. Did not really notice when this started since earlier today did not feel any significant slowdowns.

  
  That's what happened:
    PID   USER      PR  NI  VIRT  RES   SHR   S  %CPU %MEM    TIME+  COMMAND           
  13155 root      20   0 61424  25m 2948 R  99,6          1,3   1:06.01 accounts-daemon 

  
  netikras@netikras-netbook /tmp $ while :; do ps aux | grep accounts|grep -v grep;echo; sleep 2; done
  root     13155 93.6 26.1 555660 519912 pts/0   Sl   01:11   3:15 /usr/lib/accountsservice/accounts-daemon

  root     13155 92.7 26.1 555660 519912 pts/0   Sl   01:11   3:15
  /usr/lib/accountsservice/accounts-daemon

  root     13155 91.9 26.1 555660 519912 pts/0   Sl   01:11   3:15
  /usr/lib/accountsservice/accounts-daemon

  
  accounts-daemon is using lots o CPU cycles and memory. Stats above are after restarting daemon for several times. Before this memory usage was >60%; CPU - 100%.

  In file attached you should  be able to see there's a loop checking
  for something repeatedly. Not sure this is the cause though, but feels
  like it..

  
  It's the first time I've noticed this problem, but I often leave my computer running unattended so I cannot tell if it's really the first time it happened.

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