Kernel Tweaks

[root@cw002 /var/crash]# cat /boot/loader.conf
zpool_cache_load="YES"
zpool_cache_type="/boot/zfs/zpool.cache"
zpool_cache_name="/boot/zfs/zpool.cache"
aio_load="YES"
zfs_load="YES"
ipmi_load="YES"
hw.mca.enabled="1"
hw.igb.max_interrupt_rate="32000"
net.inet.tcp.syncache.hashsize="2048"
net.inet.tcp.syncache.bucketlimit="150"

####################################################

[root@cw002 /var/crash]# cat /etc/sysctl.conf
# $FreeBSD: releng/10.1/etc/sysctl.conf 112200 2003-03-13 18:43:50Z mux $
#
#  This file is read when going to multi-user and its contents piped thru
#  ``sysctl'' to adjust kernel values.  ``man 5 sysctl.conf'' for details.
#

# Uncomment this to prevent users from seeing information about processes that
# are being run under another UID.
#security.bsd.see_other_uids=0
kern.ipc.somaxconn=6000
# set to at least 16MB for 10GE hosts
kern.ipc.maxsockbuf=16777216
# socket buffers
net.inet.tcp.recvspace=4194304
net.inet.tcp.sendspace=10097152
net.inet.tcp.sendbuf_max=16777216
net.inet.tcp.recvbuf_max=16777216
net.inet.tcp.sendbuf_auto=1
net.inet.tcp.recvbuf_auto=1
net.inet.tcp.sendbuf_inc=16384
net.inet.tcp.recvbuf_inc=524288
# security
security.bsd.see_other_uids=0
security.bsd.see_other_gids=0
# drop UDP packets destined for closed sockets
net.inet.udp.blackhole=1
# drop TCP packets destined for closed sockets
net.inet.tcp.blackhole=2
# ipfw
net.inet.ip.fw.verbose_limit=3
# maximum incoming and outgoing IPv4 network queue sizes
net.inet.ip.intr_queue_maxlen=2048
net.route.netisr_maxqlen=2048

net.inet.icmp.icmplim: 400
net.inet.tcp.fast_finwait2_recycle=1
kern.random.sys.harvest.ethernet=0
net.inet.ip.portrange.randomized=0
net.link.lagg.0.use_flowid=0
net.inet.ip.portrange.first=10000
net.inet.ip.portrange.last=65535