Peer 103.245.88.xxx:60352/80 unexpectedly shrunk window 4253769012:4253769013 (repaired)
Peer 189.187.136.xxx:57952/80 unexpectedly shrunk window 1376271901:1376277661 (repaired)
TCP: tcp_parse_options: Illegal window scaling value 161 >14 received
 

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv4.ip_local_port_range = 1024 65535
# increase Linux autotuning TCP buffer limit
net.ipv4.tcp_rmem = 4096 25165824 25165824
net.ipv4.tcp_wmem = 4096 65536 25165824
# increase TCP max buffer size settable using setsockopt()
net.core.rmem_max = 25165824
net.core.rmem_default = 25165824
net.core.wmem_max = 25165824
net.core.wmem_default = 65536
net.core.optmem_max = 25165824
# increase the length of the processor input queue
net.core.netdev_max_backlog = 30000
#20131227
fs.file-max = 6553600
net.netfilter.nf_conntrack_max = 196608
net.nf_conntrack_max = 196608
net.ipv4.tcp_max_syn_backlog = 4096 

user nginx;
worker_processes 8;
worker_rlimit_nofile 1000000;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
#multi_accept on;
events {
worker_connections 4096;
} 

Limit Soft Limit Hard Limit Units
Max cpu time unlimited unlimited seconds
Max file size unlimited unlimited bytes
Max data size unlimited unlimited bytes
Max stack size 8388608 unlimited bytes
Max core file size 0 unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 128167 128167 processes
Max open files 8192 8192 files
Max locked memory 65536 65536 bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 128167 128167 signals
Max msgqueue size 819200 819200 bytes
Max nice priority 0 0
Max realtime priority 0 0
Max realtime timeout unlimited unlimited us