Found this a few months ago on IBM website -
The following will allow you to check AIX filesets prior to installation to ascertain if a bosboot and reboot are needed as part of the install. This information is not shown as part of a preview of the installation
Column Q is what you are interested in.
A Y indicates that running processes can be affected by the installation of this fileset. An N indicates that running processes are not affected by the installation of this fileset. A B indicates bosboot and quiescent. A b indicates bosboot and not quiescent.
server1(root)# installp -l -d .
Fileset Name Level I/U Q Content
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bos.perf.diag_tool 5.1.0.25 I N usr,root # Performance Diagnostic Tool
bos.perf.libperfstat 5.1.0.50 I N usr # Performance Statistics Library Interface
bos.perf.perfstat 5.1.0.50 I b usr,root # Performance Statistics Interface
bos.perf.tools 5.1.0.50 I N usr # Base Performance Tools
bos.sysmgt.loginlic 5.1.0.0 I N usr,root # License Management
bos.sysmgt.nim.client 5.1.0.50 I N usr,root # Network Install Manager - Client Tools
bos.sysmgt.nim.master 5.1.0.50 I N usr # Network Install Manager - Master Tools
bos.sysmgt.nim.spot 5.1.0.50 I N usr # Network Install Manager - SPOT
bos.sysmgt.quota 5.1.0.25 I N usr # Filesystem Quota Commands
bos.sysmgt.serv_aid 5.1.0.50 I N usr,root # Software Error Logging and Dump Service Aids
bos.sysmgt.smit 5.1.0.50 I N usr # System Management Interface Tool (SMIT)
bos.sysmgt.sysbr 5.1.0.50 I N usr,root # System Backup and BOS Install Utilities
bos.sysmgt.trace 5.1.0.50 I N usr,root # Software Trace Service Aids
perfagent.tools 5.1.0.50 I N usr,root # Local Performance Analysis & Control Commands