Struct rerun::dataframe::external::re_chunk_store::ChunkStoreChunkStats

pub struct ChunkStoreChunkStats {
    pub num_chunks: u64,
    pub total_size_bytes: u64,
    pub num_rows: u64,
    pub num_events: u64,
}

Stats about a collection of chunks.

Each chunk contains data for only one entity.

Each chunk has data for either zero timelines (static chunk) or multiple timelines (temporal chunk). A temporal chunk has dense timelines.

Each chunk can contain multiple components (columns).

Fields

num_chunks: u64

The number of chunks this is the stats for.

total_size_bytes: u64

Includes everything: arrow payloads, timelines, rowids, and chunk overhead.

This is an approximation of the actual storage cost of an entity, as the measurement includes the overhead of various data structures we use in the database. It is imprecise, because it does not account for every possible place someone may be storing something related to the entity, only most of what is accessible inside this chunk store.

num_rows: u64

Number of rows.

This is usually the same as the number of log calls the user made. Each row can contain multiple events (see Self::num_events).

num_events: u64

How many component batches (“cells”).

Implementations

impl ChunkStoreChunkStats

pub fn from_chunk(chunk: &Arc<Chunk>) -> ChunkStoreChunkStats

Trait Implementations

impl Add for ChunkStoreChunkStats

type Output = ChunkStoreChunkStats

The resulting type after applying the + operator.

fn add(self, rhs: ChunkStoreChunkStats) -> <ChunkStoreChunkStats as Add>::Output

Performs the + operation.

impl AddAssign for ChunkStoreChunkStats

fn add_assign(&mut self, rhs: ChunkStoreChunkStats)

Performs the += operation.

impl Clone for ChunkStoreChunkStats

fn clone(&self) -> ChunkStoreChunkStats

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ChunkStoreChunkStats

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

Formats the value using the given formatter.

impl Default for ChunkStoreChunkStats

fn default() -> ChunkStoreChunkStats

Returns the “default value” for a type.

impl Display for ChunkStoreChunkStats

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

Formats the value using the given formatter.

impl Sub for ChunkStoreChunkStats

type Output = ChunkStoreChunkStats

The resulting type after applying the - operator.

fn sub(self, rhs: ChunkStoreChunkStats) -> <ChunkStoreChunkStats as Sub>::Output

Performs the - operation.

impl SubAssign for ChunkStoreChunkStats

fn sub_assign(&mut self, rhs: ChunkStoreChunkStats)

Performs the -= operation.

impl Sum for ChunkStoreChunkStats

fn sum<I>(iter: I) -> ChunkStoreChunkStats

where I: Iterator<Item = ChunkStoreChunkStats>,

Method which takes an iterator and generates Self from the elements by “summing up” the items.

impl Copy for ChunkStoreChunkStats