Module metrics 

Statics

DIEM_STORAGE_API_LATENCY_SECONDS

DIEM_STORAGE_COMMITTED_TXNS

DIEM_STORAGE_LATEST_TXN_VERSION

DIEM_STORAGE_LEDGER_VERSION

DIEM_STORAGE_NEXT_BLOCK_EPOCH

DIEM_STORAGE_OTHER_TIMERS_SECONDS

DIEM_STORAGE_ROCKSDB_PROPERTIES

Rocksdb metrics