NFS defaults for read/write blocksize....(Was: Re: 5.4/amd64 console hang)

Willem Jan Withagen wjw at
Sun Apr 17 14:10:11 PDT 2005

Willem Jan Withagen wrote:
> Kris Kennaway wrote:
>>> By the way, I'm thinking that more frequently hang might related with
>>> large read/write block in mount_nfs -r/-w (I use 8192, original is 
>>> 1024).
>> That's certainly possible since non-default settings don't get as much
>> testing.  It would be good to get a traceback.

Sorry for the typos.

> Has it even been considered to up these values to something bigger??

even == ever

> Reason I ask, is since some discussions from a year ago tempted me to do 
> some (non-scientific) NFS performance testing. 
> (

make that:

> Ever since then I'm of the opinion that sizes of read/write should be at 
> least 8K, or bigger depending on the data.
> And yes, I'm aware that bonnie can hardly be considered a serious 
> benchmark tool. But I would think that the results would warant at least 
> this change.
> I no longer have some of the hardware, so redoing this test with 
> something like 'make buildworld' is not really possible. But I'm looking 
> into getting again a series of older boxes to run some more tests on.


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