When update 2 came out for vCenter 6 recently I jumped on it. Thinking that since it was an update there should not be any issues to come from it. Then one day I was looking at the Xtrem IO and noticed close to 1TB of bandwidth being used. I saw that all the activity was coming from the SQL server that our vCenter used. So I immediately got with our DBA, and he confirmed that it was vCenter creating all that IO. Luckly VMware support was able to quickly send me to this article.
Brandon Graves 
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