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RHCS on All Flash Cluster : Performance Blog Series : tuned.conf profile for ceph nodes
cat /usr/lib/tuned/ceph-tuned/tuned.conf
[main]
summary=ceph_perf
[cpu]
governor=performance
energy_perf_bias=performance
min_perf_pct=100
force_latency=1
[disk]
readahead=>4096
[sysctl]
kernel.sched_min_granularity_ns = 10000000
kernel.sched_wakeup_granularity_ns = 15000000
fs.aio-max-nr=1048576
kernel.pid_max=4194303
fs.file-max=26234859
vm.zone_reclaim_mode=0
vm.swappiness=1
vm.dirty_ratio = 10
vm.dirty_background_ratio = 5
net.ipv4.tcp_rmem=4096 87380 134217728
net.ipv4.tcp_wmem=4096 65536 134217728
net.core.rmem_max=268435456
net.core.wmem_max=268435456
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_slow_start_after_idle = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.tcp_mtu_probing = 1
net.ipv4.tcp_timestamps = 0
net.core.netdev_max_backlog = 50000
net.ipv4.tcp_max_syn_backlog = 30000
net.ipv4.tcp_max_tw_buckets = 2000000
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