Struct PageCacheStats 

#[non_exhaustive]
pub struct PageCacheStats {
    pub size: BytePageSize,
    pub hits: u64,
    pub misses: u64,
    pub fallbacks: u64,
    pub cached: u64,
    pub freed: u64,
    pub pages: usize,
    pub bytes: usize,
}

Page cache statistics of one page size.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

size: BytePageSize

Page size, BytePageSize::Unset for the totals of all page sizes.

hits: u64

Number of pages of this size taken from the cache, including pages taken in place of the next larger size, see fallbacks.

misses: u64

Number of requests for this page size that found no cached page of this size.

misses - fallbacks pages were allocated.

fallbacks: u64

Number of misses of a new buffer served with a cached page of the next smaller size, which is counted as a hit of that size.

cached: u64

Number of released pages returned to the cache.

freed: u64

Number of released pages freed because the cache was full.

pages: usize

Number of pages in the cache.

bytes: usize

Memory held by the pages in the cache, in bytes.

Trait Implementations

impl Clone for PageCacheStats

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PageCacheStats

impl Debug for PageCacheStats

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

Formats the value using the given formatter.

impl Default for PageCacheStats

fn default() -> Self

Returns the “default value” for a type.

impl Eq for PageCacheStats

impl PartialEq for PageCacheStats

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for PageCacheStats