Struct VfsMetrics 

pub struct VfsMetrics {

    pub disk_reads: i64,
    pub disk_writes: i64,
    pub disk_bytes_read: i64,
    pub disk_bytes_written: i64,
    pub blob_reads: i64,
    pub blob_writes: i64,
    pub blob_bytes_read: i64,
    pub blob_bytes_written: i64,
    pub cache_hits: i64,
    pub cache_misses: i64,
    pub cache_miss_pages: i64,
    pub prefetch_pages: i64,
    pub lease_acquires: i64,
    pub lease_renewals: i64,
    pub lease_releases: i64,
    pub syncs: i64,
    pub dirty_pages_synced: i64,
    pub blob_resizes: i64,
    pub revalidations: i64,
    pub revalidation_downloads: i64,
    pub revalidation_diffs: i64,
    pub pages_invalidated: i64,
    pub journal_uploads: i64,
    pub journal_bytes_uploaded: i64,
    pub wal_uploads: i64,
    pub wal_bytes_uploaded: i64,
    pub azure_errors: i64,
}

Per-connection VFS activity counters.

All fields are signed 64-bit integers matching the C sqlite_objs_metrics struct. Counters are zeroed when the database file is opened and can be reset at any time via SQLITE_OBJS_FCNTL_STATS_RESET.

Fields

disk_reads: i64

Number of pread calls to the local cache file.

disk_writes: i64

Number of pwrite calls to the local cache file.

disk_bytes_read: i64

Total bytes read from the local cache file.

disk_bytes_written: i64

Total bytes written to the local cache file.

blob_reads: i64

Number of Azure blob read operations.

blob_writes: i64

Number of Azure blob write operations.

blob_bytes_read: i64

Total bytes downloaded from Azure.

blob_bytes_written: i64

Total bytes uploaded to Azure.

cache_hits: i64

Page reads satisfied from the local cache.

cache_misses: i64

Page reads that required a network fetch.

cache_miss_pages: i64

Individual pages fetched due to cache misses.

prefetch_pages: i64

Pages loaded during prefetch (full-blob download at open).

lease_acquires: i64

Number of blob lease acquisitions.

lease_renewals: i64

Number of blob lease renewals.

lease_releases: i64

Number of blob lease releases.

syncs: i64

Number of xSync calls.

dirty_pages_synced: i64

Dirty pages flushed to Azure during sync.

blob_resizes: i64

Number of blob resize operations.

revalidations: i64

Number of ETag revalidation checks.

revalidation_downloads: i64

Revalidations that required a full re-download.

revalidation_diffs: i64

Revalidations that applied an incremental diff.

pages_invalidated: i64

Pages invalidated by revalidation.

journal_uploads: i64

Number of journal file uploads.

journal_bytes_uploaded: i64

Total bytes of journal data uploaded.

wal_uploads: i64

Number of WAL file uploads.

wal_bytes_uploaded: i64

Total bytes of WAL data uploaded.

azure_errors: i64

Azure HTTP errors (after retry exhaustion).

Implementations

impl VfsMetrics

pub const FIELD_COUNT: usize = 27

The number of counters in the metrics struct.

pub fn parse(text: &str) -> Result<Self, ParseError>

Parse the key=value\n text returned by FCNTL 201 / PRAGMA sqlite_objs_stats.

Unrecognised keys are silently ignored so that older Rust code can read metrics from a newer C library that added counters. Missing keys default to zero.

Errors

Returns ParseError if a recognised key has a non-integer value.

Trait Implementations

impl Clone for VfsMetrics

fn clone(&self) -> VfsMetrics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VfsMetrics

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

Formats the value using the given formatter.

impl Default for VfsMetrics

fn default() -> VfsMetrics

Returns the “default value” for a type.

impl PartialEq for VfsMetrics

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for VfsMetrics

impl StructuralPartialEq for VfsMetrics