Re: Will this command increase server performance?

Hi Jody,

Apparently the delayed_ack change gives you faster throughput for file transfers to windows machines, it alleviates a known winsock2 behaviour - the following from Dr Rolf Jansen on Apples' OS X Server list:

I cannot really talk for Mac OS X 10.2. However, according to the following thread at lists.samba.org, this setting is important for every UNIX/Linux to Windows TCP connection. Please read: http://lists.samba.org/archive/samba-technical/2001-June/014687.html Especially read and understand the link inside: http://www.dd.iij4u.or.jp/~okuyamak/Documents/tuning.english.html

I personally found the second link a little hard to follow - a healthy mixture of my ignorance and an interesting japanese -> english translation.

cheers
adam.

At 10:02 AM -0700 7/6/05, Jody McAlister wrote:

/usr/sbin/sysctl -w net.inet.tcp.delayed_ack=0

I monitor the xserve list and it was mentioned that a recent test comparison hadn't implemented this command yet so the results weren't true. That you needed to run this command to tweak the server to run those tests faster with it's response time. They were talking about mysql performance at that point. but my question is, would running this command make a mac running as a server snappier towards tcp requests and result in overall better performance?
Jody McAlister
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