sysctl.conf

# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.

# Controls IP packet forwarding
net.ipv4.ip_forward = 1

# Controls source route verification
net.ipv4.conf.default.rp_filter = 1

# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0

# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0

# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1

# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1

# Controls the default maxmimum size of a mesage queue
#kernel.msgmnb = 65536

# Controls the maximum size of a message, in bytes
#kernel.msgmax = 65536

# Controls the maximum shared segment size, in bytes
#kernel.shmmax = 68719476736

# Controls the maximum number of shared memory segments, in pages
#kernel.shmall = 4294967296


##Locuz  18 march 2016
#
###For Network Performance
net.ipv4.tcp_timestamps=0
net.ipv4.tcp_sack=1
net.core.rmem_max=4194304
net.core.wmem_max=4194304
net.core.rmem_default=4194304
net.core.wmem_default=4194304
net.core.optmem_max=4194304
net.ipv4.tcp_rmem=4096 87380 4194304
net.ipv4.tcp_wmem=4096 65536 4194304
net.ipv4.tcp_low_latency=1
net.ipv4.tcp_tw_reuse=1
net.ipv4.tcp_tw_recycle=1
net.core.somaxconn = 1024
net.ipv4.tcp_max_syn_backlog=4096
net.ipv4.icmp_echo_ignore_broadcasts=1
net.ipv4.icmp_ignore_bogus_error_responses=1
net.ipv4.ip_local_port_range = 32768 61000
fs.file-max=1750000
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1800
kernel.shmmax=4294967296
kernel.shmmni=20960
kernel.shmall=4294967296
kernel.sem = 250 32000 100 128
net.ipv4.conf.all.arp_filter = 1
kernel.randomize_va_space = 0
net.ipv4.neigh.default.gc_thresh1=2048
net.ipv4.neigh.default.gc_thresh2=4096
net.ipv4.neigh.default.gc_thresh3=8192
vm.zone_reclaim_mode = 1