Change to kern.ipc.nmbclusters?



  • Up to yesterdays build the default value of this on the AMD build seems to have been 32768
    I have it set to 65536 as I run out of mbufs with all the internet routes. However on the latest build 2.0-BETA5 (amd64)
    built on Fri Jan 28 00:53:50 EST 2011 it seems to have been reduced to 25600 and I can't seem to override it on the system tunables page. So I've run sysctl kern.ipc.nmbcluster=65536
    While that does then give the system enough resources to respond properly it does not survive a reboot.

    Could someone point me to where it is set, or has it been compiled into the kernel? This is causing all sorts of slowdown problems eg ssh connections timeing out web gui unresponsive and I'm getting sudden bgp drops due to this shortage of network Mbufs.



  • @Gloom:

    kern.ipc.nmbcluster=65536

    Put that in /boot/loader.conf.local (create the file if necessary).



  • That holds across reboots and upgrades. Thanks


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