You can actually enable sylink debugging via symhelp if you wish or just run symhelp to see what it shows.
Sylink debugging will continuously run until you turn it off, although the log will rollover depending on how large you want to set it but it won't grow out of control.
Troubleshooting computer issues with the Symantec Help support tool
http://www.symantec.com/docs/HOWTO80839
How to use the advanced debug logging options for the Symantec Endpoint Protection client in SymHelp
http://www.symantec.com/docs/TECH207795