Struct datafusion_execution::memory_pool::GreedyMemoryPool

pub struct GreedyMemoryPool { /* private fields */ }

A MemoryPool that implements a greedy first-come first-serve limit.

This pool works well for queries that do not need to spill or have a single spillable operator. See FairSpillPool if there are multiple spillable operators that all will spill.

Implementations

impl GreedyMemoryPool

pub fn new(pool_size: usize) -> Self

Allocate up to limit bytes

Trait Implementations

impl Debug for GreedyMemoryPool

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl MemoryPool for GreedyMemoryPool

fn grow(&self, _reservation: &MemoryReservation, additional: usize)

Infallibly grow the provided reservation by additional bytes

fn shrink(&self, _reservation: &MemoryReservation, shrink: usize)

Infallibly shrink the provided reservation by shrink bytes

fn try_grow( &self, reservation: &MemoryReservation, additional: usize ) -> Result<()>

Attempt to grow the provided reservation by additional bytes

fn reserved(&self) -> usize

Return the total amount of memory reserved

fn register(&self, _consumer: &MemoryConsumer)

Registers a new MemoryConsumer

fn unregister(&self, _consumer: &MemoryConsumer)

Records the destruction of a MemoryReservation with MemoryConsumer