https://github.com/cockroachdb/cockroach/blob/14c5215987e857d881c46749dbcf42f1a724ae1d/pkg/ccl/storageccl/engineccl/mvcc.go#L44 https://github.com/cockroachdb/cockroach/blob/14c5215987e857d881c46749dbcf42f1a724ae1d/pkg/ccl/storageccl/export.go#L144 This should reduce p99 by a lot.