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LookupMemoryCacheConfig

laminar_core::lookup::lookup_cache

Struct LookupMemoryCacheConfig 

Source 
pub struct LookupMemoryCacheConfig {
    pub capacity_bytes: usize,
    pub ttl: Option<Duration>,
}
Expand description

Configuration for LookupMemoryCache.

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§capacity_bytes: usize

Memory budget in bytes. Entries are weighted by their RecordBatch array size, so a few wide rows can’t blow the bound the way an entry-count limit would. The budget is split across internal shards; an entry larger than a shard’s slice is rejected rather than admitted (it degrades to a re-fetch, never an error).

§ttl: Option<Duration>

Optional time-to-live. An entry older than ttl is treated as a miss on the next get_cached (lazy expiry) and dropped, so the caller re-fetches from the source. None = entries live until the byte bound evicts them (eventual freshness via eviction

  • CDC invalidation only).

Trait Implementations§

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impl Clone for LookupMemoryCacheConfig

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fn clone(&self) -> LookupMemoryCacheConfig

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 Copy for LookupMemoryCacheConfig

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impl Debug for LookupMemoryCacheConfig

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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 LookupMemoryCacheConfig

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fn default() -> Self

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

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