Struct ExecutionMemoryContext 

pub struct ExecutionMemoryContext { /* private fields */ }

Execution context with memory awareness.

This context provides memory allocation for query execution operators and adjusts chunk sizes based on memory pressure.

Implementations

impl ExecutionMemoryContext

pub fn new(manager: Arc<BufferManager>) -> Self

Creates a new execution memory context.

pub fn allocate(&mut self, size: usize) -> Option<MemoryGrant>

Requests memory for execution buffers.

Returns None if the allocation cannot be satisfied.

pub fn allocate_tracked(&mut self, size: usize) -> bool

Allocates and stores a grant internally.

The grant will be released when this context is dropped.

pub fn pressure_level(&self) -> PressureLevel

Returns the current pressure level.

pub fn should_reduce_chunk_size(&self) -> bool

Returns whether chunk size should be reduced due to memory pressure.

pub fn adjusted_chunk_size(&self, requested: usize) -> usize

Computes adjusted chunk size based on memory pressure.

pub fn optimal_chunk_size(&self) -> usize

Returns the optimal chunk size for the current memory state.

pub fn total_allocated(&self) -> usize

Returns total bytes allocated through this context.

pub fn manager(&self) -> &Arc<BufferManager>

Returns the buffer manager.

pub fn release_all(&mut self)

Releases all tracked grants.

Trait Implementations

impl Drop for ExecutionMemoryContext

fn drop(&mut self)

Executes the destructor for this type.