.vnc folder becoming too large

I’m running into an issue on my Linux machine where my .vnc folder is growing to some insane size. If I do an ls -al .vnc, I get:

-rw-------  1 bob   eng 153939968 Sep 10 18:15 .nfs000000000bc5644c00000006

I nuked the file, and everything is fine now, but how do I prevent this from occurring in the future?

—– EDIT ———–

For background, I am using VNC to connect from a windows machine to various linux build servers in a lab. I use the VNC to do automated builds on these machines. Each of these machines maps a filesystem with a shared home directory. This directory is hosted on another fileserver, and is limited in size (~1GB). The other day, I ran out of storage space. I discovered that there were several .log files in my .vnc directory which were huge, so I nuked those, and I was good. Yesterday, I hit a case where there was a new file .nfs000000000bc5644c00000006, which was just as large and is causing me the same issues.