Nginx Disk usage increase since upgrading from nginx 1.9 to 1.11.1

Got about 3 notices in the last 24 hours from NodeQuery that disk usage usage was at 80%. The only change was updating Nginx from 1.9 to 1.11.1.

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Only time this has happened in the past is during a restore, or some other high intensity disk usage situations.

Code:

It seems one of your servers is consuming a lot of resources.

Server: xxxxxxxxxxxx
Last Update: 2016-05-31 21:48:10
Alert Trigger: 2016-05-31 21:50:01

Average: 1.00 1.00 1.00

System Load: 50%
Ram Usage: 34%
Disk Usage: 81%

php-fpm 0.6% 66.04 MB nginx (2)
mysqld 0.3% 244.79 MB mysql (1)
sshfs 0% 110.91 MB root (1)
nginx 0% 90.15 MB nginx (2)
nginx 0% 40.68 MB root (1)
lfd 0% 22.77 MB root (1)
memcached 0% 22.75 MB nobody (1)
php-fpm 0% 8.57 MB root (1)
rsyslogd 0% 5.04 MB root (1)
sshd 0% 2.48 MB root (2)

If you don't want to receive alerts anymore, log into your account and edit the
notification settings for your server.

Feel free to reply to this message if you are experiencing problems with our
services.

Thanks,
NodeQuery.com

Anything I can do to check to see what the issue is, if anything?

 

Never mind, I realize that this isn't disk swap or disk speed, it appears to be just a disk "space" issue, lol.

Are there some old backups of centmin mod installations that I can safely remove if everything is running ok?