listTags (all) is used in CLI as a tag cache, which is generating too much overhead. Compare with show-groups which does almost the same thing. Modules generated whole new magnitude of tags.
listTags
show-groups
PR #1967
Metadata Update from @tkopecek: - Custom field Size adjusted to None
Metadata Update from @jcupova: - Issue tagged with: testing-ready
Metadata Update from @jcupova: - Issue tagged with: testing-done
Commit f84b3d9a fixes this issue
Commit 4edb9b15 fixes this issue
Metadata Update from @tkopecek: - Issue set to the milestone: 1.20.1 (was: 1.21)
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/1954
Please continue any further discussion there.