Not necessarily. For example, an uncompressed log will saturate disk more easily than a compressed log but if compression is fast enough the compressed log wil

Not necessarily. For example, an uncompressed log will saturate disk more easily than a compressed log but if compression is fast enough the compressed log will write more data in the same amount of time. A more complex case: a column store might write in batches. Later an insert in the middle might require the entire batch to be read from disk and then rewritten. This makes queries faster later on but at the cost of more disk io up front. In this case disk bandwidth is also saturated but write performance might be worse than an append-only log that does not optimize at all for reads/queries.