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Subject: Re: rsize,wsize=1M causes severe lags in 10/100 Mbps
To:     linux-nfs@vger.kernel.org
Cc:     Trond Myklebust <trondmy@gmail.com>
References: <80353d78-e3d9-0ee2-64a4-cd2f22272fbe@gmail.com>
 <CAABAsM7XHjTC4311-XY04RSy_XJs+E+j+-3prYAarX_=k0259g@mail.gmail.com>
From:   Alkis Georgopoulos <alkisg@gmail.com>
Message-ID: <ee758eaf-c02d-f669-bc31-f30e6b17d92a@gmail.com>
Date:   Thu, 19 Sep 2019 18:58:09 +0300
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On 9/19/19 6:08 PM, Trond Myklebust wrote:
> The default client behaviour is just to go with whatever recommended
> value the server specifies. You can change that value yourself on the
> knfsd server by editing the pseudo-file in
> /proc/fs/nfsd/max_block_size.


Thank you, and I guess I can automate this, by running
`systemctl edit nfs-kernel-server`, and adding:
[Service]
ExecStartPre=sh -c 'echo 32768 > /proc/fs/nfsd/max_block_size'

But isn't it a problem that the defaults cause errors in dmesg and 
severe lags in 10/100 Mbps, and even make 1000 Mbps a lot less snappy 
than with 32K?

In any case thank you again.
Alkis Georgopoulos