On 5.2/i386, man sysctl says
To adjust the number of kernel nfsio threads used to service asynchronous
I/O requests on an NFS client machine:
# sysctl vfs.nfs.iothreads=4
The default is 4; 20 is the maximum. See nfssvc(2) and nfsd(8) for
further discussion.
Does it still apply? The default now seems to be
# sysctl vfs.nfs.iothreads
vfs.nfs.iothreads=-1
which scales itself to 4 when I copy a file from a NFS server.
Should I be touching vfs.nfs.iothreads manually?
Setting it to 20 just panicked my 5.2/i386.
Also, neither nfssvc(2) nor nfsd(8) seems
to contain any "further discussion" of this.
Jan