Multiple timers in OpenResty

bogdan · 2015-11-20T00:55:18+00:00

That's how I have implemented but business/security team wants to have immediate effect. Maybe, I will have to set expires to 30sec and take t...

Multiple timers in OpenResty

bogdan

Hello, all

We intend to add a bigger number of timers to our OpenResty-basedapplication. The number of timers would be around 20-30 (anyway,probably under 100).

I'm wondering if there are any concerns regarding the performance penalties:

- I understand that timers (light threads) are functioning by sharingtime in the same physical thread. Would this impact negatively theperformance of timers?- would the code executed by timers will impact negatively the rest ofthe tasks executed by NginX?

Each timer would execute some Redis queries and some mathematicalcalculations. Nothing too difficult. I wanted to know your opinion onthis concept, or possible alternatives to this timers architecture.


Thank you

Bogdan Irimia

doujiang24

Hello,

2015-11-18 21:19 GMT+08:00 Bogdan Irimia <bo...@digitair.ro>:

Hello, all

We intend to add a bigger number of timers to our OpenResty-based application. The number of timers would be around 20-30 (anyway, probably under 100).

actually, this is not a big number :)

I'm wondering if there are any concerns regarding the performance penalties:
- I understand that timers (light threads) are functioning by sharing time in the same physical thread. Would this impact negatively the performance of timers?

normally, a timer is a fake request

so, it's not a good idea to create a long time running timer (so as request)

you can create another timer in the old timer :)

And as an reminder, there has two timer number config parameter :)

https://github.com/openresty/lua-nginx-module#lua_max_pending_timers

https://github.com/openresty/lua-nginx-module#lua_max_running_timers

- would the code executed by timers will impact negatively the rest of the tasks executed by NginX?

Each timer would execute some Redis queries and some mathematical calculations. Nothing too difficult. I wanted to know your opinion on this concept, or possible alternatives to this timers architecture.

yes, I always do like this :)

Thank you

Bogdan Irimia.