The free plan of Deno Deploy gives me 450,000 read units and 300,000 write units per month. One read unit is equivalent to 4 kB of read. If you read a 2 kB record this is 1 read unit. If you read 4.1 kB record then it’s 2 read units. If you use the list function and read 10 records and their total size is 3 kB, then this is 1 read unit in total.