Rationale

For an RPC provider, monitoring the gas consumption of eth_call is crucial for assessing node capacity and usage. Traffic throughput alone offers limited insight. For example, CPU usage might rise disproportionately to traffic, highlighting the importance of gas tracking.

Recently, Besu has added this metric hyperledger/besu#9019.

Implementation

Introduce a prometheus Histogram/Summary metric: rpc_gas_used_eth_call