uWSGI detected max file descriptor number : 1024

Question

@China_OS 你好，想跟你请教个问题：在Ubuntu下构建有一个Web APP框架，Nginx+uWSGI+Django，

通过负载测试工具高压测试，结果只能产生1024个并发量，修改单进程最大可操作文件描述符，修改后为65535，重启后，uWSGI日志报告，detected max file descriptor number : 1024。请问是什么会导致这个问题无法正常修改？

Answer 1

主要相关配置：

#add to /etc/sysctl.conf，内核参数
fs.file-max = 999999
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_rmem = 4096 32768 262142
net.ipv4.tcp_wmem = 4096 32768 262142
net.core.netdev_max_backlog = 8096
net.core.rmem_default = 262144
net.core.wmem_default = 262144
net.core.rmem_max = 2097152
net.core.wmem_max = 2097152
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 65536

#参数配置结果
libing~$ sudo sysctl -p
fs.file-max = 999999
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_rmem = 4096 32768 262142
net.ipv4.tcp_wmem = 4096 32768 262142
net.core.netdev_max_backlog = 8096
net.core.rmem_default = 262144
net.core.wmem_default = 262144
net.core.rmem_max = 2097152
net.core.wmem_max = 2097152
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 65536

#add to /etc/security/limits.conf
* hard nofile 65535
* soft nofile 10000

#配置结果
libing~$ ulimit -n
65535

#uWSGI配置文件，未设置用户及用户组，设置也是同样1024
[uwsgi]

socket=127.0.0.1:8090
chmod-socket=777
plugins=python
pythonpath=/home/libing/Agriculture/agriculture/
module=agriculture.wsgi
master=true
processes=4
vacuum=true
max-request=51200
pidfile=/home/libing/Agriculture/logs/Agriculture.pid
logto=/home/libing/Agriculture/logs/Agriculture.log

Answer 2

回复
先单压nginx 看看是不是有1024限制，然后再压nginx+uwsgi看看，看配置应该没问题的，fs.file-max 999999没有设置这么大的...

Answer 3

回复
单压Nginx发现，产生负载时就只能产生2000左右，产生压力就已经受限制了，尝试去修改/usr/include/bits/typesizes.h的__FD_SETSIZE，重新编译测试工具httperf，发现没有奏效，是否是select和epoll选择的问题？

Answer 4

回复
这个看来你nginx这一层并发就上不来，不需要修改源码，应该是系统参数哪里设置的有问题。

Answer 5

回复
我使用的ubuntu 14.04系统，不知道还要改哪些配置，主要参考http://itlab.idcquan.com/linux/administer/958961.html

Answer 6

回复
最近在外地乱跑....

Answer 7

你修改的哪里？