Mysql优化方面：
1.sql语句优化
创建索引： CREATE INDEX idx_user_openid_ptid ON tb_pt_user (openid,ptid);
2.服务器配置优化，主要优化缓存
配置文件位置 ： /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
innodb_buffer_pool_size = 1G
innodb_additional_mem_pool_size = 64M
innodb_thread_concurrency = 8
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 128M
innodb_log_file_size = 512M
innodb_log_files_in_group = 2
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 60
# SAFETY #
max-allowed-packet = 16M
max-connect-errors = 1000000
skip-name-resolve
sysdate-is-now = 1
# CACHES AND LIMITS #
tmp-table-size = 32M
max-heap-table-size = 32M
query-cache-type = 0
query-cache-size = 0
max-connections = 15000
thread-cache-size = 50
open-files-limit = 65535
table-definition-cache = 1024
table-open-cache = 2048
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[client]
port = 3306
default-character-set=utf8
Nginx优化
配置文件位置 ：/etc/nginx/nginx.conf
# For more information on configuration, see:
# * Official English Documentation: http://nginx.org/en/docs/
# * Official Russian Documentation: http://nginx.org/ru/docs/
user nginx;
worker_processes 8; #1; the server 172.16.30.201 has 8 CPUs, modified by Shao Xiaoling
worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000; # the server 172.16.30.201 has 8 CPUs, modified by Shao Xiaoling
worker_rlimit_nofile 150000;
error_log /var/log/nginx/error.log;
#error_log /var/log/nginx/error.log notice;
#error_log /var/log/nginx/error.log info;
pid /var/run/nginx.pid;
events {
worker_connections 150000;
multi_accept on;
use epoll; #epoll是多路复用IO(I/O Multiplexing)中的一种方式,但是仅用于linux2.6以上内核,可以大大提高nginx的性能; modified by Shao Xiaoling
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
#keepalive_timeout 0;
keepalive_timeout 30;
keepalive_requests 100000;
reset_timedout_connection on;
client_body_timeout 10;
send_timeout 2;
#gzip on;
gzip on; #modified by Shao Xiaoling
#the following gzip parameters added by shao Xiaoling
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_comp_level 6;
gzip_types text/html text/plain text/css text/javascript application/json application/javascript application/x-javascript application/xml;
gzip_vary on;
# Load config files from the /etc/nginx/conf.d directory
# The default server is in conf.d/default.conf
include /etc/nginx/conf.d/*.conf;
}
Tcp协议栈优化
1.安装服务：
yum -y install netperf iperf
2.修改配置文件
文件位置： /etc/sysctl.conf
kernel.sysrq = 0
kernel.panic = 20
kernel.softlockup_panic=1
kernel.core_uses_pid = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 25769803776
kernel.shmall = 4294967296
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
kernel.hung_task_timeout_secs = 0
kernel.core_pattern = core
fs.file-max = 655350
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_fin_timeout = 3
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_timestamps = 0
net.ipv4.ip_local_port_range = 2000 65000
net.ipv4.tcp_max_syn_backlog = 3240000
net.ipv4.tcp_max_tw_buckets = 1440000
net.ipv4.route.gc_timeout = 100
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_sack = 1
net.nf_conntrack_max = 2048576
net.netfilter.nf_conntrack_max = 2048576
net.netfilter.nf_conntrack_tcp_timeout_established = 60
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 30
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 30
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 30
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_mem = 3097431 4129911 6194862
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
net.ipv4.tcp_congestion_control = cubic
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.tcp_keepalive_time = 30
net.ipv4.tcp_keepalive_probes = 2
net.ipv4.tcp_keepalive_intvl = 15
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 3240000
vm.swappiness = 5
vm.zone_reclaim_mode = 0
vm.overcommit_memory = 1
vm.panic_on_oom = 0
vm.drop_caches = 1
vm.dirty_ratio = 30
vm.dirty_background_ratio = 30
vm.dirty_writeback_centisecs = 50000
vm.vfs_cache_pressure = 200
vm.min_free_kbytes = 256000
3.使配置文件生效
sysctl -p /etc/sysctl.conf
在mysql ，nginx 修改配置文件时先stop服务再重新启动服务
查看mysql服务状态 /etc/init.d/mysqld status
查看nginx服务状态 /etc/init.d/nginx status
启动mysql服务状态 /etc/init.d/mysqld start
启动nginx服务状态 /etc/init.d/nginx start
Mysql命令
{start|stop|status|restart|condrestart|try-restart|reload|force-reload}
Nginx命令
{start|stop|reload|configtest|status|force-reload|upgrade|restart|reopen_logs}
配置文件备份是按照加上日期。
列如：my.cnf my.cnf.20160425 2016年4月25日备份版本1
my.cnf.20160425_02 2016年4月25日备份版本2
