org.rocksdb

枚举 HistogramType

java.lang.Object

java.lang.Enum<HistogramType>

org.rocksdb.HistogramType

所有已实现的接口:

java.io.Serializable, java.lang.Comparable<HistogramType>

public enum HistogramType
extends java.lang.Enum<HistogramType>

枚举常量概要

枚举常量

枚举常量和说明
ASYNC_READ_BYTES
BLOB_DB_BLOB_FILE_READ_MICROS Blob file read latency.
BLOB_DB_BLOB_FILE_SYNC_MICROS Blob file sync latency.
BLOB_DB_BLOB_FILE_WRITE_MICROS Blob file write latency.
BLOB_DB_COMPRESSION_MICROS BlobDB compression time.
BLOB_DB_DECOMPRESSION_MICROS BlobDB decompression time.
BLOB_DB_GET_MICROS BlobDB Get lagency.
BLOB_DB_KEY_SIZE Size of keys written to BlobDB.
BLOB_DB_MULTIGET_MICROS BlobDB MultiGet latency.
BLOB_DB_NEXT_MICROS BlobDB Next latency.
BLOB_DB_PREV_MICROS BlobDB Prev latency.
BLOB_DB_SEEK_MICROS BlobDB Seek/SeekToFirst/SeekToLast/SeekForPrev latency.
BLOB_DB_VALUE_SIZE Size of values written to BlobDB.
BLOB_DB_WRITE_MICROS BlobDB Put/PutWithTTL/PutUntil/Write latency.
BYTES_COMPRESSED number of bytes compressed.
BYTES_DECOMPRESSED number of bytes decompressed.
BYTES_PER_MULTIGET
BYTES_PER_READ Value size distribution in each operation.
BYTES_PER_WRITE
COMPACTION_OUTFILE_SYNC_MICROS
COMPACTION_TIME
COMPRESSION_TIMES_NANOS
DB_GET
DB_MULTIGET
DB_SEEK
DB_WRITE
DECOMPRESSION_TIMES_NANOS
ERROR_HANDLER_AUTORESUME_RETRY_COUNT The number of retry in auto resume
FILE_READ_COMPACTION_MICROS
FILE_READ_DB_OPEN_MICROS
FILE_READ_FLUSH_MICROS
FLUSH_TIME Time spent flushing memtable to disk.
HISTOGRAM_ENUM_MAX
MANIFEST_FILE_SYNC_MICROS
NUM_FILES_IN_SINGLE_COMPACTION
NUM_INDEX_AND_FILTER_BLOCKS_READ_PER_LEVEL Num of Index and Filter blocks read from file system per level in MultiGet request
NUM_SST_READ_PER_LEVEL Num of SST files read from file system per level in MultiGet request.
NUM_SUBCOMPACTIONS_SCHEDULED The number of subcompactions actually scheduled during a compaction.
READ_BLOCK_COMPACTION_MICROS
READ_BLOCK_GET_MICROS
READ_NUM_MERGE_OPERANDS
SST_READ_MICROS
SUBCOMPACTION_SETUP_TIME
TABLE_OPEN_IO_MICROS TIME SPENT IN IO DURING TABLE OPEN.
TABLE_OPEN_PREFETCH_TAIL_READ_BYTES 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
TABLE_SYNC_MICROS
WAL_FILE_SYNC_MICROS
WRITE_RAW_BLOCK_MICROS
WRITE_STALL

方法概要

限定符和类型	方法和说明
static HistogramType	getHistogramType(byte value) Get Histogram type by byte value.
byte	getValue() Returns the byte value of the enumerations value
static HistogramType	valueOf(java.lang.String name) 返回带有指定名称的该类型的枚举常量。
static HistogramType[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

DB_GET

public static final HistogramType DB_GET

DB_WRITE

public static final HistogramType DB_WRITE

COMPACTION_TIME

public static final HistogramType COMPACTION_TIME

SUBCOMPACTION_SETUP_TIME

public static final HistogramType SUBCOMPACTION_SETUP_TIME

TABLE_SYNC_MICROS

public static final HistogramType TABLE_SYNC_MICROS

COMPACTION_OUTFILE_SYNC_MICROS

public static final HistogramType COMPACTION_OUTFILE_SYNC_MICROS

WAL_FILE_SYNC_MICROS

public static final HistogramType WAL_FILE_SYNC_MICROS

MANIFEST_FILE_SYNC_MICROS

public static final HistogramType MANIFEST_FILE_SYNC_MICROS

TABLE_OPEN_IO_MICROS

public static final HistogramType TABLE_OPEN_IO_MICROS

TIME SPENT IN IO DURING TABLE OPEN.

DB_MULTIGET

public static final HistogramType DB_MULTIGET

READ_BLOCK_COMPACTION_MICROS

public static final HistogramType READ_BLOCK_COMPACTION_MICROS

READ_BLOCK_GET_MICROS

public static final HistogramType READ_BLOCK_GET_MICROS

WRITE_RAW_BLOCK_MICROS

public static final HistogramType WRITE_RAW_BLOCK_MICROS

NUM_FILES_IN_SINGLE_COMPACTION

public static final HistogramType NUM_FILES_IN_SINGLE_COMPACTION

DB_SEEK

public static final HistogramType DB_SEEK

WRITE_STALL

public static final HistogramType WRITE_STALL

SST_READ_MICROS

public static final HistogramType SST_READ_MICROS

NUM_SUBCOMPACTIONS_SCHEDULED

public static final HistogramType NUM_SUBCOMPACTIONS_SCHEDULED

The number of subcompactions actually scheduled during a compaction.

BYTES_PER_READ

public static final HistogramType BYTES_PER_READ

Value size distribution in each operation.

BYTES_PER_WRITE

public static final HistogramType BYTES_PER_WRITE

BYTES_PER_MULTIGET

public static final HistogramType BYTES_PER_MULTIGET

BYTES_COMPRESSED

public static final HistogramType BYTES_COMPRESSED

number of bytes compressed.

BYTES_DECOMPRESSED

public static final HistogramType BYTES_DECOMPRESSED

number of bytes decompressed.

number of bytes is when uncompressed; i.e. before/after respectively

COMPRESSION_TIMES_NANOS

public static final HistogramType COMPRESSION_TIMES_NANOS

DECOMPRESSION_TIMES_NANOS

public static final HistogramType DECOMPRESSION_TIMES_NANOS

READ_NUM_MERGE_OPERANDS

public static final HistogramType READ_NUM_MERGE_OPERANDS

FLUSH_TIME

public static final HistogramType FLUSH_TIME

Time spent flushing memtable to disk.

BLOB_DB_KEY_SIZE

public static final HistogramType BLOB_DB_KEY_SIZE

Size of keys written to BlobDB.

BLOB_DB_VALUE_SIZE

public static final HistogramType BLOB_DB_VALUE_SIZE

Size of values written to BlobDB.

BLOB_DB_WRITE_MICROS

public static final HistogramType BLOB_DB_WRITE_MICROS

BlobDB Put/PutWithTTL/PutUntil/Write latency.

BLOB_DB_GET_MICROS

public static final HistogramType BLOB_DB_GET_MICROS

BlobDB Get lagency.

BLOB_DB_MULTIGET_MICROS

public static final HistogramType BLOB_DB_MULTIGET_MICROS

BlobDB MultiGet latency.

BLOB_DB_SEEK_MICROS

public static final HistogramType BLOB_DB_SEEK_MICROS

BlobDB Seek/SeekToFirst/SeekToLast/SeekForPrev latency.

BLOB_DB_NEXT_MICROS

public static final HistogramType BLOB_DB_NEXT_MICROS

BlobDB Next latency.

BLOB_DB_PREV_MICROS

public static final HistogramType BLOB_DB_PREV_MICROS

BlobDB Prev latency.

BLOB_DB_BLOB_FILE_WRITE_MICROS

public static final HistogramType BLOB_DB_BLOB_FILE_WRITE_MICROS

Blob file write latency.

BLOB_DB_BLOB_FILE_READ_MICROS

public static final HistogramType BLOB_DB_BLOB_FILE_READ_MICROS

Blob file read latency.

BLOB_DB_BLOB_FILE_SYNC_MICROS

public static final HistogramType BLOB_DB_BLOB_FILE_SYNC_MICROS

Blob file sync latency.

BLOB_DB_COMPRESSION_MICROS

public static final HistogramType BLOB_DB_COMPRESSION_MICROS

BlobDB compression time.

BLOB_DB_DECOMPRESSION_MICROS

public static final HistogramType BLOB_DB_DECOMPRESSION_MICROS

BlobDB decompression time.

NUM_INDEX_AND_FILTER_BLOCKS_READ_PER_LEVEL

public static final HistogramType NUM_INDEX_AND_FILTER_BLOCKS_READ_PER_LEVEL

Num of Index and Filter blocks read from file system per level in MultiGet request

NUM_SST_READ_PER_LEVEL

public static final HistogramType NUM_SST_READ_PER_LEVEL

Num of SST files read from file system per level in MultiGet request.

ERROR_HANDLER_AUTORESUME_RETRY_COUNT

public static final HistogramType ERROR_HANDLER_AUTORESUME_RETRY_COUNT

The number of retry in auto resume

ASYNC_READ_BYTES

public static final HistogramType ASYNC_READ_BYTES

TABLE_OPEN_PREFETCH_TAIL_READ_BYTES

public static final HistogramType TABLE_OPEN_PREFETCH_TAIL_READ_BYTES

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

FILE_READ_FLUSH_MICROS

public static final HistogramType FILE_READ_FLUSH_MICROS

FILE_READ_COMPACTION_MICROS

public static final HistogramType FILE_READ_COMPACTION_MICROS

FILE_READ_DB_OPEN_MICROS

public static final HistogramType FILE_READ_DB_OPEN_MICROS

HISTOGRAM_ENUM_MAX

public static final HistogramType HISTOGRAM_ENUM_MAX

方法详细资料

values

public static HistogramType[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (HistogramType c : HistogramType.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static HistogramType valueOf(java.lang.String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

java.lang.IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

java.lang.NullPointerException - 如果参数为空值

getValue

public byte getValue()

Returns the byte value of the enumerations value

返回:

byte representation

getHistogramType

public static HistogramType getHistogramType(byte value)

Get Histogram type by byte value.

参数:

value - byte representation of HistogramType.

返回:

HistogramType instance.

抛出:

java.lang.IllegalArgumentException - if an invalid value is provided.