Struct BufferPool 

pub struct BufferPool { /* private fields */ }

Slab-allocating pool. Shared across tenants; tenant accounting happens at the metrics layer only. Thread-safe via Mutex on the per-class free lists; metrics are lock-free atomics.

Implementations

impl BufferPool

pub fn new(default_tenant_soft_limit_bytes: u64) -> Self

Construct with the given per-tenant default soft limit (bytes).

pub fn set_tenant_soft_limit( &self, tenant_id: impl Into<Arc<str>>, soft_limit_bytes: u64, )

Configure a per-tenant override. Unknown tenants get the default limit on their first allocation.

pub fn acquire(&self, requested: usize) -> (Vec<u8>, PoolClass)

Acquire a slab of at least requested bytes. Returns the allocated Vec<u8> and the class it came from. The Vec is empty (len=0) but has the capacity of its class; callers extend_from_slice into it.

pub fn release(&self, slab: Vec<u8>, class: PoolClass)

Return a previously acquired slab to the pool. Callers typically do this via the Drop impl of the wrapping buffer once all views have dropped. In 11.b we expose the API explicitly; a Drop-wired version lands in a follow-up revision.

pub fn record_tenant_allocation( &self, tenant_id: impl Into<Arc<str>>, bytes: u64, )

Record bytes of live buffer allocation against a tenant. Emits the soft-limit-exceeded counter when appropriate.

pub fn record_tenant_release(&self, tenant_id: impl Into<Arc<str>>, bytes: u64)

Symmetric to [record_tenant_allocation]; called when a buffer drops.

pub fn snapshot(&self) -> BufferPoolSnapshot

Snapshot for metric export / tests.

Trait Implementations

impl Default for BufferPool

fn default() -> Self

Returns the “default value” for a type.