Here are some tuning options you should consider implementing on your NIM Server. Generally, most NIM servers are probably fairly small with may be one or two vCPUs and perhaps 8GB of RAM. Make to most of the resources you have.
Category: "NIM Tips"
nimadm fails with this error: /usr/bin/mkszfile: FS_MIN_LOG = FS_MIN_LOG * 20480 : 0403-009 The specified number is not valid for this command.
Multibos -R errors: 0516-1008 rmlv: Logical volume hd10opt must be closed. If the logical volume contains a filesystem, the umount command will close the LV device.
How I tuned my NIM server part 2. This part deals with AIX Kernel Scheduling tuning and JFS2 mount options.
How I tuned my NIM server part 1. This is the first part detailing tuning changes made to an AIX 7.1 (now 7.2) NIM Server.