{[cassim, metadata_cache, hit], [
    {type, counter},
    {desc, <<"number of cassim metadata cache lookup hits">>}
]}.
{[cassim, metadata_cache, miss], [
    {type, counter},
    {desc, <<"number of cassim metadata cache lookup misses">>}
]}.
{[cassim, security_migration, success], [
    {type, counter},
    {desc, <<"number of successful cassim security doc migrations">>}
]}.
{[cassim, security_migration, conflict], [
    {type, counter},
    {desc, <<"number of conflicted cassim security doc migrations">>}
]}.