Struct mz_persist_client::stats::SnapshotStats

pub struct SnapshotStats {
    pub shard_id: ShardId,
    pub num_updates: usize,
}

Statistics about the contents of a shard as_of some time.

TODO: Add more stats here as they become necessary.

Fields

shard_id: ShardId

The shard these statistics are for.

num_updates: usize

An estimate of the count of updates in the shard.

This is an upper bound on the number of updates that persist_source would emit if you snapshot the source at the given as_of. The real number of updates, after consolidation, might be lower. It includes both additions and retractions.

NB: Because of internal persist compaction, the answer for a given as_of may change over time (as persist advances through Seqnos), but because compaction never results in more updates than the sum of the inputs, it can only go down.

Trait Implementations

impl Debug for SnapshotStats

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

Formats the value using the given formatter.