What exactly is net.inet.tcp.sockthreshold?
What exactly is net.inet.tcp.sockthreshold?
- Subject: What exactly is net.inet.tcp.sockthreshold?
- From: "Chris McFarling" <email@hidden>
- Date: Fri, 30 Sep 2005 09:51:49 -0500
/etc/sysctl-macosxserver.conf states the following:
# Some sysctl variables administrators may consider setting in
/etc/sysctl.conf:
#
# This sets a threshold that triggers increasing the send/recv windows for
TCP
# connection from 32K to 64K to improve some file downloads.
# If your server has a lot of memory and serves only local traffic (like AFP
cli
ents
# on local LAN) you may want to increase this value beyond its default of
256 pc
bs.
#
# net.inet.tcp.sockthreshold=512
When it says"256 pcbs", what does that mean? Also, how does the triggering
mechanism work...when does the OS use 32K windows and when does it use 64K
windows?
The reason I ask is because I actually want to set the window size to 18K.
I'm doing some testing and want to see if a smaller window size will
increase performance on my network. In doing so I'm trying to understand OS
X's behavior though.
Thanks for any help.
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