Struct IoStats 

pub struct IoStats {

    pub transactions: u64,
    pub reads: u64,
    pub cache_reads: u64,
    pub writes: u64,
    pub bytes_read: u64,
    pub cache_read_bytes: u64,
    pub bytes_written: u64,
    pub deletes: u64,
    pub prefix_deletes: u64,
    pub write_size_buckets: HashMap<usize, u64>,
    pub tx_write_size_buckets: HashMap<usize, (u64, f64)>,
    pub started: u64,
    pub span: Duration,
}

Statistic for the span period

Fields

transactions: u64

Number of transaction.

reads: u64

Number of read operations.

cache_reads: u64

Number of reads resulted in a read from cache.

writes: u64

Number of write operations.

bytes_read: u64

Number of bytes read

cache_read_bytes: u64

Number of bytes read from cache

bytes_written: u64

Number of bytes write

deletes: u64

Number of delete operations.

prefix_deletes: u64

Number of prefix (batch) delete operations.

write_size_buckets: HashMap<usize, u64>

Write size buckets. Keys are write sizes, slightly rounded upwards. Values are the number of times a value of a particular size was written.

tx_write_size_buckets: HashMap<usize, (u64, f64)>

Similar to write_size_buckets but tracks total sizes of transactions and the average duration for a transaction of that size. The duration is in microseconds.

started: u64

Start of the statistic period in microseconds since epoch.

span: Duration

Total duration of the statistic period.

Implementations

impl IoStats

pub fn empty() -> Self

Empty statistic report.

pub fn record_write(&mut self, size: usize)

Record a write operation with a given size.

pub fn record_tx_write(&mut self, size: usize, duration_micros: f64)

Record a transaction operation with a given size. This tracks sizes of all values within transactions rather than individual writes.

pub fn avg_batch_size(&self) -> f64

Average batch (transaction) size (writes per transaction)

pub fn reads_per_sec(&self) -> f64

Read operations per second.

pub fn byte_reads_per_sec(&self) -> f64

pub fn writes_per_sec(&self) -> f64

Write operations per second.

pub fn byte_writes_per_sec(&self) -> f64

pub fn ops_per_sec(&self) -> f64

Total number of operations per second.

pub fn transactions_per_sec(&self) -> f64

Transactions per second.

pub fn avg_transaction_size(&self) -> f64

pub fn cache_hit_ratio(&self) -> f64

Trait Implementations

impl Clone for IoStats

fn clone(&self) -> IoStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IoStats

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

Formats the value using the given formatter.