[main]
include=throughput-performance

[cpu]
force_latency=1
governor=performance
energy_perf_bias=performance
min_perf_pct=100

[script]
script=script.sh

[disk]
readahead=>0

[sysctl]
# ktune sysctl settings for rhel6 servers, maximizing i/o throughput
#
# Minimal preemption granularity for CPU-bound tasks:
# (default: 1 msec#  (1 + ilog(ncpus)), units: nanoseconds)
kernel.sched_min_granularity_ns=10000000

# If a workload mostly uses anonymous memory and it hits this limit, the entire
# working set is buffered for I/O, and any more write buffering would require
# swapping, so it's time to throttle writes until I/O can catch up.  Workloads
# that mostly use file mappings may be able to use even higher values.
#
# The generator of dirty data starts writeback at this percentage (system default
# is 20%)
vm.dirty_ratio=10

# Start background writeback (via writeback threads) at this percentage (system
# default is 10%)
vm.dirty_background_ratio=3

# The swappiness parameter controls the tendency of the kernel to move
# processes out of physical memory and onto the swap disk.
# 0 tells the kernel to avoid swapping processes out of physical memory
# for as long as possible
# 100 tells the kernel to aggressively swap processes out of physical memory
# and move them to swap cache
vm.swappiness=0

# The total time the scheduler will consider a migrated process
# "cache hot" and thus less likely to be re-migrated
# (system default is 500000, i.e. 0.5 ms)
kernel.sched_migration_cost_ns=5000000

#number of max socket connections , should be >size of cluster
net.core.somaxconn = 8192

# Sets the maximum number of packets allowed to queue when a particular interface receives packets faster than the kernel can process them
net.core.netdev_max_backlog = 250000

# allow more ports to be used
net.ipv4.ip_local_port_range = 32769 65535
net.ipv4.tcp_rfc1337 = 1
net.ipv4.tcp_max_tw_buckets = 1440000

net.ipv4.tcp_mtu_probing=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_adv_win_scale=2
net.ipv4.tcp_low_latency=1
net.ipv4.tcp_timestamps=1
net.ipv4.tcp_sack=1
net.core.netdev_budget=600
net.ipv4.tcp_max_syn_backlog=4096
net.ipv4.tcp_fin_timeout=10

net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.core.rmem_default=16777216
net.core.wmem_default=16777216

#net.core.optmem_max=4194304
net.ipv4.tcp_rmem=4096 87380 16777216
net.ipv4.tcp_wmem=4096 87380 16777216

#make sure there is enough free space to prevent OOM until no real free memory left
vm.min_free_kbytes = 512000

# If this is set to 1, the kernel panics when out-of-memory happens. 
vm.panic_on_oom = 1

# allow magic keys for debugging on console
kernel.sysrq = 1
kernel.shmmax = 137438953472

# don't panic at oops so we can finish writing dumps and traces.
kernel.panic_on_oops = 1

# Disable IPv6
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1