update interval to sane default value
update interval to sane default value

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