nginx + lua, bad performance of os.execute(), Requests per second is very low.

yong.y.luo · 2018-12-21T21:46:52+00:00

Hello!> Is there any way to close connection that is in 'reading' state?No. As per current design, there is no way to cancel the reading state,exc...

nginx + lua, bad performance of os.execute(), Requests per second is very low.

yong.y.luo

我想在Nginx+Lua中调用一个C++程序。

In a nignx configuration:

location =/something {

access_by_lua_file("mytest.lua")

}

mytest.lua has only one line of code, well, almost only one line.

os.execute("myc")

C++ program myc.cpp does not do anything but return 0.

When I use ab command to test the performance, the RPS is very low.

igor.clark

Even without getting into any nginx or Lua questions, process creation overhead is high, and if you’re doing it per-request then you’re effectively reintroducing the performance penalties of a CGI program. What are you trying to do, I wonder? Could you maybe use Lua FFI, if it has to be C/C++?

On 21 Dec 2018, at 13:46, yong.y.luo via openresty-en <openresty-en@googlegroups.com> wrote:

我想在Nginx+Lua中调用一个C++程序。
In a nignx configuration:

location =/something {

access_by_lua_file("mytest.lua")
}

mytest.lua has only one line of code, well, almost only one line.

os.execute("myc")

C++ program myc.cpp does not do anything but return 0.

When I use ab command to test the performance, the RPS is very low.

.

minikawoon2017

I think you can try nginx-link-function , it is nginx module to dynamic linking to your c/c++ application and your application with nginx as well

Here are the Tips and trick to workaround

On Friday, December 21, 2018 at 9:46:52 PM UTC+8, yong....@googlemail.com wrote:

我想在Nginx+Lua中调用一个C++程序。
In a nignx configuration:

location =/something {

access_by_lua_file("mytest.lua")
}

mytest.lua has only one line of code, well, almost only one line.

os.execute("myc")

C++ program myc.cpp does not do anything but return 0.

When I use ab command to test the performance, the RPS is very low.