Struct AdaptiveMemtableSizer 

pub struct AdaptiveMemtableSizer { /* private fields */ }

Adaptive memtable sizer with memory pressure feedback

Dynamically adjusts memtable flush threshold based on:

1. Write rate (to maintain target buffer duration)
2. Memory pressure (to avoid OOM)

Implementations

impl AdaptiveMemtableSizer

pub fn new() -> Self

Create a new adaptive sizer with default configuration

pub fn with_config(config: AdaptiveMemtableConfig) -> Self

Create with custom configuration

pub fn record_write(&self, bytes: usize)

Record bytes written (call on every write)

pub fn current_size(&self) -> usize

Get current recommended memtable size

pub fn write_rate(&self) -> f64

Get estimated write rate in bytes per second

pub fn memory_pressure(&self) -> f64

Get current memory pressure (0.0 - 1.0)

pub fn update(&self) -> usize

Update the adaptive size (call periodically, e.g., every second)

Returns the new recommended memtable size

pub fn should_flush(&self, current_memtable_bytes: u64) -> bool

Check if the memtable should be flushed based on current size

pub fn stats(&self) -> AdaptiveMemtableStats

Get statistics for monitoring

Trait Implementations

impl Default for AdaptiveMemtableSizer

fn default() -> Self

Returns the “default value” for a type.