Enum Histogram

#[repr(u32)]
pub enum Histogram {
    DbGet = 0,
    DbWrite = 1,
    CompactionTime = 2,
    CompactionCpuTime = 3,
    SubcompactionSetupTime = 4,
    TableSyncMicros = 5,
    CompactionOutfileSyncMicros = 6,
    WalFileSyncMicros = 7,
    ManifestFileSyncMicros = 8,
    TableOpenIoMicros = 9,
    DbMultiget = 10,
    ReadBlockCompactionMicros = 11,
    ReadBlockGetMicros = 12,
    WriteRawBlockMicros = 13,
    NumFilesInSingleCompaction = 14,
    DbSeek = 15,
    WriteStall = 16,
    SstReadMicros = 17,
    FileReadFlushMicros = 18,
    FileReadCompactionMicros = 19,
    FileReadDbOpenMicros = 20,
    FileReadGetMicros = 21,
    FileReadMultigetMicros = 22,
    FileReadDbIteratorMicros = 23,
    FileReadVerifyDbChecksumMicros = 24,
    FileReadVerifyFileChecksumsMicros = 25,
    NumSubcompactionsScheduled = 26,
    BytesPerRead = 27,
    BytesPerWrite = 28,
    BytesPerMultiget = 29,
    BytesCompressed = 30,
    BytesDecompressed = 31,
    CompressionTimesNanos = 32,
    DecompressionTimesNanos = 33,
    ReadNumMergeOperands = 34,
    BlobDbKeySize = 35,
    BlobDbValueSize = 36,
    BlobDbWriteMicros = 37,
    BlobDbGetMicros = 38,
    BlobDbMultigetMicros = 39,
    BlobDbSeekMicros = 40,
    BlobDbNextMicros = 41,
    BlobDbPrevMicros = 42,
    BlobDbBlobFileWriteMicros = 43,
    BlobDbBlobFileReadMicros = 44,
    BlobDbBlobFileSyncMicros = 45,
    BlobDbCompressionMicros = 46,
    BlobDbDecompressionMicros = 47,
    FlushTime = 48,
    SstBatchSize = 49,
    NumIndexAndFilterBlocksReadPerLevel = 50,
    NumSstReadPerLevel = 51,
    ErrorHandlerAutoresumeRetryCount = 52,
    AsyncReadBytes = 53,
    PollWaitMicros = 54,
    PrefetchedBytesDiscarded = 55,
    MultigetIoBatchSize = 56,
    NumLevelReadPerMultiget = 57,
    AsyncPrefetchAbortMicros = 58,
    TableOpenPrefetchTailReadBytes = 59,
}

Variants

DbGet = 0

DbWrite = 1

CompactionTime = 2

CompactionCpuTime = 3

SubcompactionSetupTime = 4

TableSyncMicros = 5

CompactionOutfileSyncMicros = 6

WalFileSyncMicros = 7

ManifestFileSyncMicros = 8

TableOpenIoMicros = 9

Time spent in IO during table open

DbMultiget = 10

ReadBlockCompactionMicros = 11

ReadBlockGetMicros = 12

WriteRawBlockMicros = 13

NumFilesInSingleCompaction = 14

DbSeek = 15

WriteStall = 16

SstReadMicros = 17

Time spent in reading block-based or plain SST table

FileReadFlushMicros = 18

Time spent in reading SST table (currently only block-based table) or blob file corresponding to Env::IOActivity

FileReadCompactionMicros = 19

FileReadDbOpenMicros = 20

FileReadGetMicros = 21

The following FILE_READ_* require stats level greater than StatsLevel::kExceptDetailedTimers

FileReadMultigetMicros = 22

FileReadDbIteratorMicros = 23

FileReadVerifyDbChecksumMicros = 24

FileReadVerifyFileChecksumsMicros = 25

NumSubcompactionsScheduled = 26

The number of subcompactions actually scheduled during a compaction

BytesPerRead = 27

Value size distribution in each operation

BytesPerWrite = 28

BytesPerMultiget = 29

BytesCompressed = 30

BytesDecompressed = 31

DEPRECATED / unused (see BytesCompressed{From,To})

CompressionTimesNanos = 32

DEPRECATED / unused (see BytesDecompressed{From,To})

DecompressionTimesNanos = 33

ReadNumMergeOperands = 34

Number of merge operands passed to the merge operator in user read requests.

BlobDbKeySize = 35

BlobDB specific stats Size of keys written to BlobDB. Only applicable to legacy BlobDB.

BlobDbValueSize = 36

Size of values written to BlobDB. Only applicable to legacy BlobDB.

BlobDbWriteMicros = 37

BlobDB Put/PutWithTTL/PutUntil/Write latency. Only applicable to legacy BlobDB.

BlobDbGetMicros = 38

BlobDB Get latency. Only applicable to legacy BlobDB.

BlobDbMultigetMicros = 39

BlobDB MultiGet latency. Only applicable to legacy BlobDB.

BlobDbSeekMicros = 40

BlobDB Seek/SeekToFirst/SeekToLast/SeekForPrev latency. Only applicable to legacy BlobDB.

BlobDbNextMicros = 41

BlobDB Next latency. Only applicable to legacy BlobDB.

BlobDbPrevMicros = 42

BlobDB Prev latency. Only applicable to legacy BlobDB.

BlobDbBlobFileWriteMicros = 43

Blob file write latency.

BlobDbBlobFileReadMicros = 44

Blob file read latency.

BlobDbBlobFileSyncMicros = 45

Blob file sync latency.

BlobDbCompressionMicros = 46

BlobDB compression time.

BlobDbDecompressionMicros = 47

BlobDB decompression time.

FlushTime = 48

Time spent flushing memtable to disk

SstBatchSize = 49

NumIndexAndFilterBlocksReadPerLevel = 50

MultiGet stats logged per level Num of index and filter blocks read from file system per level.

NumSstReadPerLevel = 51

Num of sst files read from file system per level.

ErrorHandlerAutoresumeRetryCount = 52

Error handler statistics

AsyncReadBytes = 53

Stats related to asynchronous read requests.

PollWaitMicros = 54

PrefetchedBytesDiscarded = 55

Number of prefetched bytes discarded by RocksDB.

MultigetIoBatchSize = 56

Number of IOs issued in parallel in a MultiGet batch

NumLevelReadPerMultiget = 57

Number of levels requiring IO for MultiGet

AsyncPrefetchAbortMicros = 58

Wait time for aborting async read in FilePrefetchBuffer destructor

TableOpenPrefetchTailReadBytes = 59

Number of bytes read for RocksDB’s prefetching contents (as opposed to file system’s prefetch) from the end of SST table during block based table open

Implementations

impl Histogram

pub const fn name(&self) -> &'static str

The corresponding rocksdb string identifier for this variant

pub fn iter() -> Iter<'static, Histogram>

Trait Implementations

impl Clone for Histogram

fn clone(&self) -> Histogram

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Histogram

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

Formats the value using the given formatter.

impl Display for Histogram

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

Formats the value using the given formatter.

impl FromStr for Histogram

type Err = NameParseError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl PartialEq for Histogram

fn eq(&self, other: &Histogram) -> 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 Copy for Histogram

impl Eq for Histogram

impl StructuralPartialEq for Histogram