Linux running

memory.conf

# Required by intensive applications like ElasticSeach
vm.max_map_count=262144

vm.swappiness = 10

vm.dirty_ratio = 80
vm.dirty_background_ratio = 5
vm.dirty_expire_centisecs = 12000

network.conf

# Max listen queue backlog
net.core.somaxconn = 1000

# Max number of packets that can be queued on interface input
# If kernel is receiving packets faster than can be processed
# this queue increases
net.core.netdev_max_backlog = 5000

# Max receive buffer size
net.core.rmem_max = 16777216

# Max send buffer size
net.core.wmem_max = 16777216

# Default receive buffer size
net.core.rmem_default=65536

# Default send buffer size
net.core.wmem_default=65536

# The first value tells the kernel the minimum receive/send buffer for each TCP connection,
# and this buffer is always allocated to a TCP socket,
# even under high pressure on the system. …
# The second value specified tells the kernel the default receive/send buffer
# allocated for each TCP socket. This value overrides the /proc/sys/net/core/rmem_default
# value used by other protocols. … The third and last value specified
# in this variable specifies the maximum receive/send buffer that can be allocated for a TCP socket.
# Note: The kernel will auto tune these values between the min-max range
# If for some reason you wanted to change this behavior, disable net.ipv4.tcp_moderate_rcvbuf
net.ipv4.tcp_wmem = 4096 12582912 16777216
net.ipv4.tcp_rmem = 4096 12582912 16777216

# Units are in page size (default page size is 4 kb)
# These are global variables affecting total pages for TCP
# sockets
# 8388608 * 4 = 32 GB
#  low pressure high
#  When mem allocated by TCP exceeds “pressure”, kernel will put pressure on TCP memory
#  We set all these values high to basically prevent any mem pressure from ever occurring
#  on our TCP sockets
net.ipv4.tcp_mem=8388608 8388608 8388608

# Increase max half-open connections.
net.ipv4.tcp_max_syn_backlog = 8096

# Increase max number of sockets allowed in TIME_WAIT
net.ipv4.tcp_max_tw_buckets=6000000

# Increase max TCP orphans
# These are sockets which have been closed and no longer have a file handle attached to them
net.ipv4.tcp_max_orphans=262144

# Only retry creating TCP connections twice
# Minimize the time it takes for a connection attempt to fail
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2

# Timeout closing of TCP connections after 7 seconds
net.ipv4.tcp_fin_timeout = 7

# Avoid falling back to slow start after a connection goes idle
# keeps our cwnd large with the keep alive connections
net.ipv4.tcp_slow_start_after_idle = 0

net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_abort_on_overflow = 1
net.ipv4.ip_local_port_range = 10240 65535

storage.conf

# Set noop scheduler
# /sys/block/*/queue/scheduler        noop
ACTION=="add|change", KERNEL=="xv*", SUBSYSTEM=="block", ATTR{queue/scheduler}="noop"

# Send the completed request back to the actual CPU that requested it
# /sys/block/*/queue/rq_affinity  2
ACTION=="add|change", KERNEL=="xv*", SUBSYSTEM=="block", ATTR{queue/rq_affinity}="2"

# Amount of I/O requests that get buffered before the I/O scheduler sends / receives data to the block device
# /sys/block/*/queue/nr_requests  256
ACTION=="add|change", KERNEL=="xv*", SUBSYSTEM=="block", ATTR{queue/nr_requests}="256"

# Amount of extra data that will get read when the OS reads a file
# /sys/block/*/queue/read_ahead_kb    256
ACTION=="add|change", KERNEL=="xv*", SUBSYSTEM=="block", ATTR{queue/read_ahead_kb}="256"