Field Specific Change Log

Hi All,

Is it possible to only log the changes for specific fields of a table? My guess is this is not possible but it is suggested not to log data changes due to performance issues. If we were to limit the tables to specific fields, perhaps we can limit the affect on performance.

Also, how big of a hit on performance can we expect if we only add logging for one additional table?

Thanks. Points will be awarded for helpful responses.