Here https://github.com/jboss-container-images/openjdk/commit/01ed72d38b6459c058b7f80fa2085f39e16e4612#diff-0d050b835a47bed9b6[…]5bae53ad570421a5cc8bcL29 is said

We've removed JAVA_INITIAL_MEM_RATIO and JAVA_MAX_INITIAL_MEM

Seems  JAVA_INITIAL_MEM_RATIO was removed here https://github.com/jboss-container-images/openjdk/commit/4e81b327994c27dde3517b78ca2c90927d8b64e5#diff-ef7b8cf9e23222e11e[]…0443f63c562b457518c9aL16

Anyway, neither of both  JAVA_INITIAL_MEM_RATIO and JAVA_MAX_INITIAL_MEM can't be find here https://github.com/jboss-container-images/openjdk