Enum BufferAccessStrategy 

pub enum BufferAccessStrategy {
    Normal,
    SequentialScan,
    BulkRead,
    BulkWrite,
}

How a caller intends to access the page cache.

Normal is the default — pages flow through the main SIEVE pool. Other variants route through small dedicated rings sized to keep scan workloads out of the main pool’s working set.

Variants

Normal

Use the main SIEVE pool. Default for OLTP-style point access.

SequentialScan

Sequential scan over a known-large relation. 16-page ring.

BulkRead

Bulk read (vector batch, timeseries chunk iter, backup export). 32-page ring.

BulkWrite

Bulk write (initial load, restore). 32-page ring; dirty pages flushed through the pager on eviction.

Implementations

impl BufferAccessStrategy

pub fn ring_size(self) -> Option<usize>

Ring capacity for non-Normal strategies, or None when the caller should use the main pool directly.

pub fn is_ring(self) -> bool

True iff the strategy uses a ring buffer (i.e. is non-Normal).

pub fn is_write(self) -> bool

True iff the strategy expects writes that must flush dirty pages on eviction. Currently only BulkWrite.

Trait Implementations

impl Clone for BufferAccessStrategy

fn clone(&self) -> BufferAccessStrategy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BufferAccessStrategy

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

Formats the value using the given formatter.

impl Default for BufferAccessStrategy

fn default() -> BufferAccessStrategy

Returns the “default value” for a type.

impl Hash for BufferAccessStrategy

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for BufferAccessStrategy

fn eq(&self, other: &BufferAccessStrategy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for BufferAccessStrategy

impl Eq for BufferAccessStrategy

impl StructuralPartialEq for BufferAccessStrategy