nginx優(yōu)化實(shí)戰(zhàn)

1、zixue.it 燕十八精品PHP教程,,nginx優(yōu)化上機(jī)實(shí)戰(zhàn)4課時(shí),zixue.it 燕十八精品PHP教程,學(xué)習(xí)目錄,1:定立優(yōu)化目標(biāo)2:排查瓶頸3:觀察日志4:參數(shù)調(diào)整5:重新測(cè)試,zixue.it 燕十八精品PHP教程,1:優(yōu)化目標(biāo),4臺(tái)服務(wù)器,組成集群,目標(biāo)每天1000W PV并發(fā)數(shù)與PV的轉(zhuǎn)換公式:每天請(qǐng)求量 : pv , 10000000每PV帶來(lái)的總請(qǐng)求: rel, 2

2、 每請(qǐng)求悲觀時(shí)長(zhǎng): reqtime ,記為2前端服務(wù)器數(shù)量: snum , 1臺(tái)每天的秒數(shù) sec: 86400峰值倍增系數(shù) fact: 3并發(fā)數(shù): connpv * fact * rel * reqtime = sec * snum * connconn = 1388. 目標(biāo): 并發(fā)1500,且響應(yīng)時(shí)間在2秒內(nèi),zixue.it 燕十八精品PHP教程,nginx撐不住?ngi

3、nx->PHP撐不住?php->mysql撐不住?nginx+php-->memcached撐不住?,2.1排查瓶頸,zixue.it 燕十八精品PHP教程,2.1排查nginx,思路:單純讓nginx返回html,不與mysql,php-fpm連接測(cè)試2000,3000,..5000并發(fā)爭(zhēng)取到5000,zixue.it 燕十八精品PHP教程,2.1排查nginx與PHP-fpm,思路:單純讓ngi

4、nx請(qǐng)求PHP,PHP頁(yè)面不與mysql,memcached連接測(cè)試2000,3000,..5000并發(fā)爭(zhēng)取到3000,zixue.it 燕十八精品PHP教程,2.2排查php-mysql,思路:單純讓nginx調(diào)用PHP,PHP與mysql連接測(cè)試500,1000,2000,并發(fā)爭(zhēng)取到2000,zixue.it 燕十八精品PHP教程,思路:nginx->php->memcached+mysql

5、ngix->memcached爭(zhēng)取到1500,2.2測(cè)試memcached,zixue.it 燕十八精品PHP教程,主要武器3.1 利用dmesg查看系統(tǒng)調(diào)試信息3.2 利用nginx error log查看錯(cuò)誤信息3.3增加nginx統(tǒng)計(jì)模塊./configure \--prefix=/usr/local/nginx/ \--add-module=/app/ngx_http_consistent_hash-m

6、aster \--with-http_stub_status_modulelocation /nginx_status { # Turn on stats stub_status on; access_log off; # only allow access from 192.168.1.5 # allow 192.168.1.5;

7、 deny all; },3.日志觀察,zixue.it 燕十八精品PHP教程,4.1.內(nèi)核參數(shù)調(diào)整,網(wǎng)絡(luò)net.core.somaxconn = 4096 允許等待中的監(jiān)聽net.ipv4.tcp_tw_recycle = 1 tcp連接快速回收net.ipv4.tcp_tw_reuse = 1 tcp連接重用 net.ipv4.tcp_syncookies = 0 不抵御洪水攻擊防火墻(建議關(guān)掉)

8、net.nf_conntrack_max = 655350 net.netfilter.nf_conntrack_tcp_timeout_established = 120文件fs.file-max = 655360 系統(tǒng)最大文件描述符進(jìn)程最大文件描述符 /etc/security/limits.conf soft nofile 50000 hard nofile 50000,zixue.it 燕十八精品PHP