Constant COPY_IN_MAX_PAYLOAD_BYTES 

pub(crate) const COPY_IN_MAX_PAYLOAD_BYTES: usize = _; // 67_108_864usize

Upper bound of a table-less COPY FROM STDIN payload (influxdb line protocol, OTLP). One COPY statement is one bounded ingestion request (the whole payload is buffered like one HTTP request body); a larger import is multiple COPY statements.