Disable read/write splitting - ApsaraDB for RDS
If the read/write splitting function is no longer needed, you can disable it. The read/write splitting function can only be used when at least one read-only instance is available, so you must disable the read/write splitting function before ...
Read/write throughput - Table Store
The read/write throughput is measured by read/write capacity units (CUs), which is the smallest billing unit for the data read and write operations.
One read CU indicates that 4 KB data is read from the table ...