if max-stale 0, load all series into mem instead of none
if max-stale 0, load all series into mem instead of none

replay/metrictank,raintank/raintank-metric,raintank/metrictank,replay/metrictank,raintank/metrictank,replay/metrictank,raintank/raintank-metric,raintank/raintank-metric,raintank/metrictank,raintank/metrictank,replay/metrictank