why are these openjdk docker images so big?

[f1-outsourcing]

[@test2 ]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
openjdk             8                   b84359d0cbce        3 weeks ago         488MB
openjdk             11                  f06fdc42d01a        3 weeks ago         604MB

[wglambert]

We also have slim variants
Looks like the section in the docs was removed in a pr about the oraclelinux variant for 12+ docker-library/docs#1467

$ docker images | grep openjdk
openjdk        8-slim                        4de02be2e9ab        3 weeks ago         269MB
openjdk        8                             b84359d0cbce        3 weeks ago         488MB
openjdk        11-slim                       b3e6b5ac389f        3 weeks ago         384MB
openjdk        11                            f06fdc42d01a        3 weeks ago         604MB

[EricLemieux]

Slim refers to Debian slim, which isn't available for all versions of java, ie 12 and 13 don't have a Debian variant (#302 for more details).

[tianon]

In this instance, slim means "not FROM buildpack-deps" and just happens to also be from the slim Debian variants to make the images even somewhat smaller.

[f1-outsourcing]

Thanks everyone

[@test2 image-openfire-4.3.2]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
openfire            4.3.2               91a5380d9e62        6 minutes ago       353MB
openfire            4.4.0               463460082ed0        10 minutes ago      491MB
openjdk             8-slim              4de02be2e9ab        4 weeks ago         269MB
openjdk             11-slim             b3e6b5ac389f        4 weeks ago         384MB