记一次500并发，平均响应时间慢-调优过程~~

记⼀次500并发，平均响应时间慢-调优过程~~ 1、背景：LR压测，并发 500、持续压测10 分钟~

压测结果，平均响应时间长

从报告可知，主要瓶颈在js、css、img上

2、解决启⽤nginx 缓存、集部署、tomcat线程调优 linux内核调优

tomcat7 启⽤nio、调⼤最⼤线程。等待队列

<Connector port="6002" enableLookups="false" maxKeepAliveRequests="1" acceptCount="550" minSpareThreads="300" maxThreads="400" protocol=" http11.Http11NioProtocol"

connectionTimeout="60000"

URIEncoding="UTF-8"

redirectPort="8443" />

初始堆内存设置

JAVA_OPTS="-Xms3g -Xmx3g -Xss1024K"

nginx缓存配置，注意：需要单独⼀个server

http模块配置：

proxy_connect_timeout 10;

proxy_read_timeout 180;

proxy_send_timeout 5;

proxy_buffer_size 16k;

proxy_buffers 4 32k;

云梯杰克逊

proxy_busy_buffers_size 96k;

proxy_temp_file_write_size 96k;

proxy_temp_path /opt/nginx/temp_dir1;

proxy_cache_path /opt/nginx/cache1 levels=1:2 keys_zone=cache_one:100m inactive=1d max_size=10g;

#gzip on;

gzip on;#开启gzip

gzip_vary on;

gzip_min_length 1k;#不压缩临界值,⼤于1k的才压缩,⼀般不⽤改

gzip_buffers 4 16k;

gzip_comp_level 6;#压缩级别，数字越⼤压缩的越好

gzip_types text/plain application/javascript application/x-javascript text/css application/xml text/javascript application/x-httpd-php image/jpeg image/gif im age/png image/x-icon;#压缩⽂件类型，缺啥补啥

server 模块~

server {

listen 8080;

server_name localhost;

location / {

root html;

index index.html index.htm;

}

location ~ .*\.(gif|jpg|png|css|js)?$ {

proxy_pass server.settle;

#缓存

proxy_cache cache_one;

proxy_cache_valid 200 302 24h;癫克星

proxy_cache_valid 301 30d;

proxy_cache_valid any 5m;

expires 10d;

}

location /fsp-manage {

proxy_pass server.settle;

疲劳强度proxy_set_header Host 172.16.2.136:8080;

proxy_set_header X-Real-IP $remote_addr;

proxy_set_header REMOTE-HOST $remote_addr;

proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

}

error_page 500 502 503 504 /50x.html;

location = /50x.html {

root html;

煤气作业

}

linux 内核调整，软件的⼝已经放⼤-需要硬件的⼝⽀撑。

内核TCP参数⽅⾯

cat /f

>>>>># aliyun configure >>>>># f.all.disable_ipv6 = 1

f.default.disable_ipv6 = 1

f.lo.disable_ipv6 = 1

vm.swappiness = 0

_stale_time=120

# see details in help.aliyun/knowledge_detail/39428.html

f.all.rp_filter=0

f.default.rp_filter=0

f.default.arp_announce = 2

f.all.arp_announce=2

f.lo.arp_announce=2

# see details in help.aliyun/knowledge_detail/41334.html

p_max_tw_buckets = 5000

p_syncookies = 1

p_max_syn_backlog = 8192

p_synack_retries = 2

kernel.sysrq = 1

>>>>># jiaxin configure >>>>># fs.file-max = 1631224

vm.overcommit_memory = 1

vm.max_map_count=655350

net.ipv4.ip_local_port_range = 1024 65530

p_tw_reuse = 1

p_tw_recycle = 0

p_fin_timeout = 30

p_keepalive_time = 1200

p_fastopen = 3

p_window_scaling = 1

p_timestamps = 1

p_sack = 1

液体表面张力p_congestion_control = hybla

p_rmem = 4096 87380 67108864

p_wmem = 4096 87380 67108864

p_mtu_probing = 1

p_keepalive_time = 60

p_keepalive_probes = 3

p_keepalive_intvl = 20

高压变压器

保存退出之后执⾏ sysctl -p 参数⽣效，永久⽣效

3、调整过程中注意观察 nginx access.log、tomcat _localhost_accsess.log ⼊⼝⽇志~~效果如下

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