The restrictions of MaxCompute are as follows:
A string column in a MaxCompute table can be up to 2 MB in length.
A single task can reference up to 512 resources, and the partition table is calculated as one unit.
The maximum size of resources referenced by single task is 64 MB.
The inputs and outputs of a single task can be up to 128.
The number of Counter defined in single task cannot exceed 64.
The default size of memory occupied by single Map or Reduce Worker is 2048 and the range is [256 MB-12 GB].
The maximum frequency of single Map or Reduce Worker reading a resource is <64.
In local running mode, the maximum number of Map Worker and Reduce Worker units is 100. The default downloaded record number of one input is 100.