I am seeing the same issue on Ubuntu Xenial with proftpd.
I am hosting 2 fairly busy proftpd servers that handle up to 10 login/secs. My /var/log/btmp are at size 0 but the /var/log/wtmp file are up to 83M, maybe more because I restarted the servers before finding this ticket to take a look at those.
The result is that the process /usr/lib/accountsservice/accounts-daemon eats one full CPU core at all time.
I am seeing the same issue on Ubuntu Xenial with proftpd.
I am hosting 2 fairly busy proftpd servers that handle up to 10 login/secs. My /var/log/btmp are at size 0 but the /var/log/wtmp file are up to 83M, maybe more because I restarted the servers before finding this ticket to take a look at those.
The result is that the process /usr/lib/ accountsservice /accounts- daemon eats one full CPU core at all time.