<![CDATA[Squid kern.ipc.nmbclusters=32768 - seemed to be large improvement here]]>Just wanted to mention that this in the /boot/loader.conf:

kern.ipc.nmbclusters=32768

….as suggested by other threads in this forum seemed to be a night and day difference for me.

Just curious if others are using this as well - it's a quick thing to try.

Not sure how to quantify it, but it certainly seems a lot faster.

]]>https://forum.netgate.com/topic/13819/squid-kern-ipc-nmbclusters-32768-seemed-to-be-large-improvement-hereRSS for NodeTue, 10 Mar 2026 12:18:47 GMTWed, 04 Mar 2009 02:44:41 GMT60<![CDATA[Reply to Squid kern.ipc.nmbclusters=32768 - seemed to be large improvement here on Fri, 29 May 2009 08:07:23 GMT]]>freebsd default is 8192, but pfsense default is 0
if you comment that and reboot.

sysctl kern.ipc.nmbclusters

That will show your current value which is default unless its being specified in /etc/sysctl.conf

performance also increase if set in /etc/sysctl.conf according to http://fasterdata.es.net/TCP-tuning/FreeBSD.html


net.inet.tcp.inflight.enable=0
net.inet.tcp.hostcache.expire=1
]]>https://forum.netgate.com/post/198642https://forum.netgate.com/post/198642Fri, 29 May 2009 08:07:23 GMT<![CDATA[Reply to Squid kern.ipc.nmbclusters=32768 - seemed to be large improvement here on Thu, 05 Mar 2009 08:11:13 GMT]]>@mhab12:

My experience has been that commenting the whole line out gives the best performance…
#kern.ipc.nmbclusters="0"

Wonder what value will be used if its commented out. Anyone have any clue what this configuration affects?

I am using the config that was given awhile ago for improving squid performance. In /boot/loader.conf:

autoboot_delay="1"
vm.kmem_size="435544320"
vm.kmem_size_max="535544320"
#kern.ipc.nmbclusters="0"
kern.hz=100
#for squid
kern.ipc.nmbclusters="32768"
kern.maxfiles="65536"
kern.maxfilesperproc="32768"
net.inet.ip.portrange.last="65535"

]]>https://forum.netgate.com/post/192372https://forum.netgate.com/post/192372Thu, 05 Mar 2009 08:11:13 GMT<![CDATA[Reply to Squid kern.ipc.nmbclusters=32768 - seemed to be large improvement here on Wed, 04 Mar 2009 16:41:38 GMT]]>My experience has been that commenting the whole line out gives the best performance…
#kern.ipc.nmbclusters="0"

]]>https://forum.netgate.com/post/192318https://forum.netgate.com/post/192318Wed, 04 Mar 2009 16:41:38 GMT