Re: high load, no bottleneck

[manu%netbsd.org@localhost (Emmanuel Dreyfus)]

Emmanuel Dreyfus <manu%netbsd.org@localhost> wrote:
 
> I tried moving a client NFS mount to async. The result is that the
> server never sees a filesync again from that client. 

Further testing shows that server with -o log / client with -o async has
no performance problem.  OTOH, the client sometimes complain about write
errors. -o async seems dangerous.

Too many fsync() causing too many WAPBL flushes seems confirmed to be
the problem at work here.

-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu%netbsd.org@localhost