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PatternStats

radixdb_executor::optimizer::workload

Struct PatternStats

pub struct PatternStats {
    pub frequency: u64,
    pub avg_execution_time_us: f64,
    pub peak_memory_bytes: u64,
    pub avg_rows_scanned: u64,
    pub avg_rows_returned: u64,
    pub hot_tables: Vec<String>,
    pub hot_filter_columns: Vec<String>,
    pub hot_sort_columns: Vec<String>,
    pub last_seen: Instant,
}

Expand description

Learned statistics for a query pattern

Fields§

§frequency: u64

Number of times this pattern was observed

§avg_execution_time_us: f64

Average execution time in microseconds

§peak_memory_bytes: u64

Peak memory usage in bytes

§avg_rows_scanned: u64

Average rows scanned

§avg_rows_returned: u64

Average rows returned

§hot_tables: Vec<String>

Tables most commonly accessed with this pattern

§hot_filter_columns: Vec<String>

Columns most commonly filtered on

§hot_sort_columns: Vec<String>

Columns most commonly in ORDER BY

§last_seen: Instant

Last observed timestamp

Trait Implementations§

impl Clone for PatternStats

fn clone(&self) -> PatternStats

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

impl Debug for PatternStats

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl Freeze for PatternStats

impl RefUnwindSafe for PatternStats

impl Send for PatternStats

impl Sync for PatternStats

impl Unpin for PatternStats

impl UnsafeUnpin for PatternStats

impl UnwindSafe for PatternStats

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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

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

impl<T> CompactArcDrop for T

unsafe fn drop_and_dealloc(ptr: *mut u8)

Drop the contained data and deallocate the header+data allocation. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> Same for T

type Output = T

Should always be Self

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

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = !

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, !>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn vzip(self) -> V