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Lamp优化实践
- 2. 高性能
非代码层面
对系统的设计
对开源软件方案的选择
对系统的监控
对服务器设置,优化
- 3. 架
构设计原则
易于扩展
结构简单
采用成熟的开源软件及解决方案
层次清晰
先可用,抗住,再优化
过度设计比不设计更龌龊
- 5. 现代硬件架构
CPU 转向多核,非提高 CPU 的主频
内存是新的磁盘,大内存多核 NUMA
磁盘,提高容量,非转速, IOPS 不高
新型 SSD , PCI-E 型 SSD ,混合存储
网卡的多通道, 10G
- 6. Web Server
Nginx + php-fpm
Nginx + php-cgi
Apache + mod_php
Apache + php-cgi
…
- 7. Nginx Tips
worker_processes
worker_cpu_affinity
open_file_cache max=xx inactive=xxs;
open_file_cache_valid xxs;
open_file_cache_min_uses 2;
sendfile on;
keepalive_timeout xx;
tcp_nopush on;
tcp_nodelay on;
- 8. PHP-fpm Tips
<value name="listen_address">/dev/shm/php.socket</value>
<value name="max_children">512</value>
<value name="request_slowlog_timeout">1s</value>
<value name="slowlog">logs/slow.log</value>
<value name="rlimit_files">65535</value>
- 10. MySQL
MySQL Server tunning
分库,分表
索引 &Explain
主从同步,读写分离
Query Cache
FlashCache 混合存储
- 11. OS
EXT4 , XFS 文件系统
CPU IO 调度算法
IO 队列长度
Raid 卡 Cache 策略,电池放电对于磁盘 IO 的影
响
多核大内存 NUMA
网卡软中断多核( RPS , RFS , RSS )
Iptables 调整
Ulimit
- 12. TCP
net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog = 32768
net.core.somaxconn = 32768
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_congestion_control = bic
net.ipv4.tcp_ecn = 0
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.tcp_keepalive_intvl = 15
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_time = 60
net.ipv4.tcp_fin_timeout = 30
net.ipv4.ip_local_port_range = 1024 65535
- 13. 无处
不在的 cache
Browser cache
Page cache
PHP 的 Realpath Cache
Nginx 的 facgi-cache
PHP opcode ( APC,eAccelerator,XCache )
DB Cache
- 14. 监控
Nagios
Cacti
PHP Slow function
PHP Error Log
Nginx Error Log
Mysql Slow Log
Redis Slow log
- 15. 其它
PHP extension
GD < Imagemagic < Graphicsmagick
memcached < memcache
xCache < eAccelerator < APC
PHP Profile
xdebug, xhprof
hiphop-php
…