Struct MemoryAccumulator

pub struct MemoryAccumulator { /* private fields */ }

Counts memory used by buffers of Arrow arrays and RecordBatches.

This is meant to capture how much memory is being used by the Arrow data structures as they are. It does not represent the memory used if the data were to be serialized and then deserialized. In particular:

• This does not double count memory used by buffers shared by multiple arrays or batches. Round-tripped data may use more memory because of this.
• This counts the total size of the buffers, even if the array is a slice. Round-tripped data may use less memory because of this.

Implementations

impl MemoryAccumulator

pub fn record_array(&mut self, array: &dyn Array)

pub fn record_batch(&mut self, batch: &RecordBatch)

pub fn total(&self) -> usize

Trait Implementations

impl Default for MemoryAccumulator

fn default() -> MemoryAccumulator

Returns the “default value” for a type.