I am running MacOS 10.14.6 on an iMac, and have found that there is a process called normalizerd that is doing about 2TB of disk writes per day. Through some internet search, found that there is a system called com.apple.print.normalizerd, which appears to be initiated by an XPC(?) called PSNormalizer. I think this might be a background process, possibly connected to pdf/postscript, and installed by XCode.
A grep for PSNormalizer in /Library found entries like
Overall, I would love to know in more detail what this process is, and more importantly how to make it stop! Thanks a lot for any assistance.