Signature Description Parameters
template<typename T>
get_memory_usage(const char *col_name) const;
It returns the memory used by the given column and index column.
All numbers are in bytes.
MemUsage is a structure defined in DataFrameTypes.h file.
NOTE: The returned values are only estimates. The actual allocated memory by OS is unknown to any container object. In other words, the actual memory used might be and probably is larger than numbers returned by this call. Also if a type (T) allocates dynamic memory, it is not included in the result
T: Type of the col_name column.
col_name: Name of the column