nginx压力测试的并发问题

tevoo2

服务器配置：Dell R710, 8G内存, ubuntu 10.10。

压力测试的页面是 index.html ，该文件值包含了"Hello World!"

500的并发： http_load -f 10000 -p 500 urllist.txt
结果：
10000 fetches, 500 max parallel, 220000 bytes, in 0.693075 seconds
22 mean bytes/connection
14428.5 fetches/sec, 317426 bytes/sec
msecs/connect: 0.4445 mean, 4.755 max, 0.143 min
msecs/first-response: 33.1882 mean, 35.305 max, 0.427 min
HTTP response codes:

600的并发：http_load -f 10000 -p 600 urllist.txt
10000 fetches, 600 max parallel, 220000 bytes, in 3.12906 seconds
22 mean bytes/connection
3195.85 fetches/sec, 70308.6 bytes/sec
msecs/connect: 14.6379 mean, 3009.82 max, 0.141 min
msecs/first-response: 45.6007 mean, 3007.76 max, 0.436 min
HTTP response codes:
  code 200 -- 10000

并发数就差100，为什么结果就差这么远？这个瓶颈会出在哪里？


我的nginx的大致配置是：

1. worker_processes  4;
   
2. worker_cpu_affinity 0001 0010 0100 1000;
   
3. worker_rlimit_nofile 102400;
   
4. events {
   
5.     use epoll;
   
6.     worker_connections  102400;
   
7. }

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/etc/security/limits.conf的配置：

1. * soft nofile 102400
   
2. * hard nofile 102400

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/etc/sysctl.conf的配置

1. net.ipv4.ip_forward = 0
   
2. net.ipv4.conf.default.rp_filter = 1
   
3. net.ipv4.conf.default.accept_source_route = 0
   
4. kernel.sysrq = 0
   
5. kernel.core_uses_pid = 1
   
6. net.ipv4.tcp_syncookies = 1
   
7. kernel.msgmnb = 65536
   
8. kernel.msgmax = 65536
   
9. kernel.shmmax = 68719476736
   
10. kernel.shmall = 4294967296
    
11. net.ipv4.tcp_max_tw_buckets = 6000
    
12. net.ipv4.tcp_sack = 1
    
13. net.ipv4.tcp_window_scaling = 1
    
14. net.ipv4.tcp_rmem = 4096        87380   4194304
    
15. net.ipv4.tcp_wmem = 4096        16384   4194304
    
16. net.core.wmem_default = 8388608
    
17. net.core.rmem_default = 8388608
    
18. net.core.rmem_max = 16777216
    
19. net.core.wmem_max = 16777216
    
20. net.core.netdev_max_backlog = 262144
    
21. net.core.somaxconn = 262144
    
22. net.ipv4.tcp_max_orphans = 3276800
    
23. net.ipv4.tcp_max_syn_backlog = 262144
    
24. net.ipv4.tcp_timestamps = 0
    
25. net.ipv4.tcp_synack_retries = 1
    
26. net.ipv4.tcp_syn_retries = 1
    
27. net.ipv4.tcp_tw_recycle = 1
    
28. net.ipv4.tcp_tw_reuse = 1
    
29. net.ipv4.tcp_mem = 94500000 915000000 927000000
    
30. net.ipv4.tcp_fin_timeout = 1
    
31. net.ipv4.tcp_keepalive_time = 30
    
32. net.ipv4.ip_local_port_range = 1024    65000

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todayhero

性能下降如此快,就表示你遇到了"拐头"!

性能压力测试的"拐头"这个词你可以去网上找找.应该有介绍!


捌头的出现.不仅仅是nginx配置的问题!
还涉及到其它的瓶颈!

network
io
memory
cpu

自己测试的时间要长30分钟以上吧!同时做好性能的实时监控!再发现问题!

todayhero

前后两次测试的时候.硬件性能,最好能自己划个画表.然后先后对比!是那部分出现了性能问题导致的.

g361031315

哥们，你这问题解决了没？我也遇到了