Docker website slow?

Question

Docker

It seemed to me that the deployed application on the host works faster than the application based on the docker container. This is true? Or is it necessary to be baptized when it seems?

Answer 1

The comments are correct. True, you need to understand that containerization in docker occurs due to cgroups and a shared kernel. Those in some situations, docker will give better results compared to full server virtualization, and there is when back. The basic rule is - if we are cpu-intensive then we can live in docker. If it is io bound (a lot of network / disk access) - "artifacts" may appear (and, as experience shows), they have to be diagnosed by debugging the kernel. But this is with loads of 10k+ requests to the vaoda-output subsystems. If you have "one and a half rings" sitting on the site - then this is most likely an infrastructure problem

Answer 2

Any containerization is an overhead. How big it is depends on specific conditions - technology, correct settings, application features. The same DBMS data, for example, should not be located inside the docker.