There are two nice changes to the pfiles tool. Sometimes it’s really useful to know what files were open when a process threw a core dump. With Solaris 11.4 pfiles got the ability to work on such core files.
The second change to the pfiles is how the tool gathers the information of a running process. Up to 11.3 the process was stopped for a short moment while pfiles collected the information. In Solaris 11.4 this isn’t done any longer.