Hello：
ngx 配置在附件
192.168.1.3 - 数据库
192.168.1.2 - ngx
192.168.1.1 - 测试机
1. ngx 开启服务
2. 测试机打开压力测试工具 ab -c 1000 -n 10000 http://192.168.1.2:8888/
3. 同时在数据库上查看连接数 netstat -antp | grep -E 192.168.1.2.*ESTABLISHED | wc -l 发现共有800个连接
请问：ngx请求数据库，建立连接数最大值不应该是 8 * 5 = 40 吗，为什么会800多。谢谢 ^^
user root;
worker_processes 8;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 65535;
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_log logs/access.log main;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
server {
listen 8888;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location /test {
}
location /debug {
content_by_lua_file '/home/ngx/debug.lua';
}
location / {
content_by_lua '
local mysql = require "resty.mysql"
local db, err = mysql:new()
if not db then
ngx.say("failed to instantiate mysql: ", err)
return
end
db:set_timeout(1000) -- 1 sec
-- or connect to a unix domain socket file listened
-- by a mysql server:
-- local ok, err, errno, sqlstate =
-- db:connect{
-- path = "/path/to/mysql.sock",
-- database = "ngx_test",
-- user = "ngx_test",
-- password = "ngx_test" }
local ok, err, errno, sqlstate = db:connect{
host = "192.168.1.3",
port = 3306,
database = "test",
user = "root",
password = "root",
max_packet_size = 1024 * 1024 }
if not ok then
ngx.say("failed to connect: ", err, ": ", errno, " ", sqlstate)
return
end
ngx.say("connected to mysql.")
local res, err, errno, sqlstate =
db:query("drop table if exists cats")
if not res then
ngx.say("bad result: ", err, ": ", errno, ": ", sqlstate, ".")
return
end
res, err, errno, sqlstate =
db:query("create table cats "
.. "(id serial primary key, "
.. "name varchar(5))")
if not res then
ngx.say("bad result: ", err, ": ", errno, ": ", sqlstate, ".")
return
end
ngx.say("table cats created.")
res, err, errno, sqlstate =
db:query("insert into cats (name) "
.. "values (\'Bob\'),(\'\'),(null)")
if not res then
ngx.say("bad result: ", err, ": ", errno, ": ", sqlstate, ".")
return
end
ngx.say(res.affected_rows, " rows inserted into table cats ",
"(last insert id: ", res.insert_id, ")")
-- run a select query, expected about 10 rows in
-- the result set:
res, err, errno, sqlstate =
db:query("select * from cats order by id asc", 10)
if not res then
ngx.say("bad result: ", err, ": ", errno, ": ", sqlstate, ".")
return
end
local cjson = require "cjson"
ngx.say("result: ", cjson.encode(res))
-- put it into the connection pool of size 100,
-- with 10 seconds max idle timeout
local ok, err = db:set_keepalive(0, 5)
if not ok then
ngx.say("failed to set keepalive: ", err)
return
end
-- or just close the connection right away:
-- local ok, err = db:close()
-- if not ok then
-- ngx.say("failed to close: ", err)
-- return
-- end
';
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;
# location / {
# root html;
# index index.html index.htm;
# }
#}
# HTTPS server
#
#server {
# listen 443 ssl;
# server_name localhost;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m;
# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;
# location / {
# root html;
# index index.html index.htm;
# }
#}
}
