Re: Very poor NFS I/O

[Greg Troxel <gdt%lexort.com@localhost>]

MJ <mjose00%optusnet.com.au@localhost> writes:

> If the load is going up but not CPU usage, perhaps something is
> blocking a process? Lock contention?

My impression has always been that load average is not only about
processes wanting CPU, but processes blocked on file IO.

I also have the impression that nfsd is not async and that it has one
outstanding (local disk) IO request per thread.

So I would be looking at what's going on with the disk, and it would not
surprise me if it's just that with a bunch clients, one can ask for IO
than can be done.

It would also not surprise me if there were nfs code problems.