Logged into a Puppet master server today and noticed that I had some high CPU utilization happening. This is rather odd as the box usually just chugs along with no worries what-so-ever. Turns out, some others noticed this as well and some had suspicions that it was leap second related. Check out the full thread here. Looking back at my SAR records, I find that my CPU spiked right around June 30th at 7PM which is July 1, Midnight GMT.