Struct CompactionStats

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pub struct CompactionStats {
    pub compactions_total: u64,
    pub l0_compactions: u64,
    pub bytes_read: u64,
    pub bytes_written: u64,
    pub hot_column_compactions: u64,
    pub cold_column_refs_preserved: u64,
    pub estimated_wa_reduction: f64,
    pub last_compaction_duration_us: u64,
}

Expand description

Statistics for column-aware compaction

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§compactions_total: u64

Total compactions performed

§l0_compactions: u64

L0 to L1 compactions

§bytes_read: u64

Total bytes read during compaction

§bytes_written: u64

Total bytes written during compaction

§hot_column_compactions: u64

Hot column compactions (only hot columns merged)

§cold_column_refs_preserved: u64

Cold column references preserved (not rewritten)

§estimated_wa_reduction: f64

Estimated write amplification reduction

§last_compaction_duration_us: u64

Last compaction duration (micros)

Implementations§

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impl CompactionStats

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pub fn write_amplification(&self) -> f64

Calculate write amplification factor

Trait Implementations§

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impl Clone for CompactionStats

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fn clone(&self) -> CompactionStats

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

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impl Debug for CompactionStats

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

Formats the value using the given formatter. Read more

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impl Default for CompactionStats

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fn default() -> CompactionStats

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl UnwindSafe for CompactionStats

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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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impl<T> Any for T
where T: 'static + ?Sized,

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where T: ?Sized,

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fn borrow(&self) -> &T

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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