limit number of error types tracked
limit number of error types tracked

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