question: get the ratio of memory allocated for all the writers . concode_field_sep Map<InternalParquetRecordWriter,Long> writerList concode_elem_sep long DEFAULT_MIN_MEMORY_ALLOCATION concode_elem_sep long totalMemoryPool concode_elem_sep float DEFAULT_MEMORY_POOL_RATIO concode_elem_sep long minMemoryAllocation concode_elem_sep double scale concode_elem_sep Log LOG concode_elem_sep float memoryPoolRatio concode_elem_sep Map<String,Runnable> callBacks concode_field_sep void removeWriter concode_elem_sep void registerScaleCallBack concode_elem_sep void addWriter concode_elem_sep double getScale concode_elem_sep void updateAllocation concode_elem_sep Map<InternalParquetRecordWriter,Long> getWriterList concode_elem_sep void checkRatio concode_elem_sep Map<String,Runnable> getScaleCallBacks concode_elem_sep long getTotalMemoryPool
target: float function ( ) { return memoryPoolRatio ; }