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systemctl list-units --type=service --state=running

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systemctl stop postfix
systemctl disable postfix

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ÓÅ»¯Äں˲ÎÊýÊÇÌáÉýЧÀÍÆ÷ÐÔÄܵÄÖ÷ÒªÒ»²½¡ £¿ÉÒÔͨ¹ýÐÞ¸Ä/etc/sysctl.confÎļþÀ´µ÷½âÄں˲ÎÊý¡£ÒÔÏÂÊÇһЩ³£ÓõÄÄں˲ÎÊýµ÷Óżƻ®£º

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# ÔöÌíϵͳ×î´óÎļþ¾ä±úÊý
fs.file-max = 65535

# ÔöÌíÿ¸öÀú³Ì¿ÉÒÔ·­¿ªµÄÎļþ¾ä±úÊýÏÞÖÆ
ulimit -n 65535

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Ìá¸ßTCPÅþÁ¬ÊýÏÞÖÆ

# ÔöÌíϵͳµÄ×î´ó²¢·¢TCPÅþÁ¬Êý
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_max_syn_backlog = 1024
net.core.somaxconn = 65535

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# Ïû³ýȺÁÄ·ÖƬ
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_sack = 0
net.ipv4.tcp_dsack = 0

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# Ìá¸ßTCPÎüÊÕ´°¿Ú»º³åÇø´óС£¨µ¥Î»£º×Ö½Ú£©
net.ipv4.tcp_rmem = 4096 87380 4194304

# Ìá¸ßTCP·¢ËÍ´°¿Ú»º³åÇø´óС£¨µ¥Î»£º×Ö½Ú£©
net.ipv4.tcp_wmem = 4096 16384 4194304

# Ìá¸ßϵͳµÄTCPÅþÁ¬¸ú×Ù±íµÄ¾Þϸ
net.netfilter.nf_conntrack_max = 65536

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sysctl -p

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Nginx

NginxÊÇÒ»¸ö¸ßÐÔÄܵÄHTTPºÍ·´ÏòÊðÀíЧÀÍÆ÷£¬ËüʹÓÃÒì²½·ÇÛÕ±ÕµÄÊÂÎñÇý¶¯¼Ü¹¹£¬¿ÉÒÔÇáËÉ´¦Àí´óÁ÷Á¿µÄÇëÇó¡£

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yum install nginx

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±à¼­/etc/nginx/nginx.confÎļþ£º

user www-data;
worker_processes auto;
worker_cpu_affinity auto;

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

http {
    # ÉèÖÃHTTPЧÀÍÆ÷
    ...
}

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Apache

ApacheÊÇÒ»¸ö¹¦Ð§¸»ºñÇÒÆÕ±éʹÓõÄwebЧÀÍÆ÷£¬ËäÈ»ÐÔÄÜÉÏÉÔÑ·ÓÚNginx£¬µ«ÔÚijЩÌض¨µÄ³¡¾°ÏÂÈÔÈ»¿ÉÒÔÌṩÓÅÒìµÄÐÔÄÜ¡£

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yum install httpd

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±à¼­/etc/httpd/conf/httpd.confÎļþ£º

ServerLimit 2048
MaxClients 2048

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ʹÓûº´æÊÖÒÕ¿ÉÒÔÓÐÓõØÌáÉýwebЧÀÍÆ÷µÄÐÔÄÜ¡ £¿ÉÒÔʹÓÃÈçÏÂÁ½ÖÖ·½·¨¾ÙÐлº´æ¼ÓËÙ£º

HTTP»º´æ

ͨ¹ýÉèÖúÏÊʵÄCache-ControlºÍExpiresÏìӦͷ£¬Èÿͻ§¶Ë»º´æ¾²Ì¬×ÊÔ´£¬ïÔ̭ЧÀÍÆ÷µÄ¸ºÔØ£¬ÌáÉýÓû§µÄ»á¼ûÌåÑ顣ʾÀý´úÂëÈçÏ£º

location /static {
    expires 7d;
}

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ʹÓ÷´ÏòÊðÀí»º´æÀ´»º´æ¶¯Ì¬ÄÚÈÝ£¬ïÔÌ­¶Ôºó¶ËЧÀÍÆ÷µÄÇëÇó¡ £¿ÉÒÔʹÓÃNginxµÄproxy_cacheÄ £¿éÀ´ÊµÏÖ·´ÏòÊðÀí»º´æ¡£Ê¾Àý´úÂëÈçÏ£º

proxy_cache_path /var/nginx/cache levels=1:2 keys_zone=my_cache:10m max_size=10g inactive=60m;
server {
    ...
    location / {
        proxy_cache my_cache;
        proxy_cache_valid 200 301 302 5m;
        proxy_pass http://backend;
    }
}

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ͨ¹ý¹Ø±Õ²»ÐëÒªµÄЧÀÍ¡¢µ÷½âÄں˲ÎÊý¡¢Ê¹ÓøßÐÔÄܵÄwebЧÀÍÆ÷ºÍʹÓûº´æ¼ÓËٵȷ½·¨£¬CentOS´î½¨µÄwebЧÀÍÆ÷¿ÉÒÔ»ñµÃ¸üºÃµÄÐÔÄܺÍÏìÓ¦ËÙÂÊ¡£Ï£Íû±¾ÎÄÌṩµÄÐÔÄܵ÷ÓÅÖ¸ÄÏÄܶԸ÷ÈËÓÐËù×ÊÖú¡£

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https://www.digitalocean.com/community/tutorials/5-tips-to-speed-up-your-nginx-web-server

https://www.digitalocean.com/community/tutorials/how-to-optimize-nginx-configuration

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