CompactionJobStats

java.lang.Object
- org.rocksdb.AbstractNativeReference
- - org.rocksdb.AbstractImmutableNativeReference
  - - org.rocksdb.RocksObject
    - - org.rocksdb.CompactionJobStats

所有已实现的接口:: java.lang.AutoCloseable

public class CompactionJobStats
extends RocksObject

字段概要
- 从类继承的字段 org.rocksdb.RocksObject
  nativeHandle_
- 从类继承的字段 org.rocksdb.AbstractImmutableNativeReference
  owningHandle_

构造器概要

构造器
构造器和说明

CompactionJobStats()

构造器
构造器和说明
`CompactionJobStats()`

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`void`	`add(CompactionJobStats compactionJobStats)` Aggregate the CompactionJobStats from another instance with this one.
`protected void`	`disposeInternal(long handle)`
`long`	`elapsedMicros()` Get the elapsed time in micro of this compaction.
`long`	`fileFsyncNanos()` Get the Time spent on file fsync.
`long`	`filePrepareWriteNanos()` Get the Time spent on preparing file write (falocate, etc) Only populated if `ColumnFamilyOptions.reportBgIoStats()` is set.
`long`	`fileRangeSyncNanos()` Get the Time spent on sync file range.
`long`	`fileWriteNanos()` Get the Time spent on file's Append() call.
`boolean`	`isManualCompaction()` Determine if the compaction is a manual compaction.
`byte[]`	`largestOutputKeyPrefix()` Get the largest output key prefix.
`long`	`numCorruptKeys()` Get the number of corrupt keys (ParseInternalKey returned false when applied to the key) encountered and written out.
`long`	`numExpiredDeletionRecords()` Get the number of deletion records that were found obsolete and discarded because it is not possible to delete any more keys with this entry.
`long`	`numInputDeletionRecords()` Get the number of deletion entries before compaction.
`long`	`numInputFiles()` Get the number of compaction input files.
`long`	`numInputFilesAtOutputLevel()` Get the number of compaction input files at the output level.
`long`	`numInputRecords()` Get the number of compaction input records.
`long`	`numOutputFiles()` Get the number of compaction output files.
`long`	`numOutputRecords()` Get the number of compaction output records.
`long`	`numRecordsReplaced()` Get the number of records being replaced by newer record associated with same key.
`long`	`numSingleDelFallthru()` Get the number of single-deletes which do not meet a put.
`long`	`numSingleDelMismatch()` Get the number of single-deletes which meet something other than a put.
`void`	`reset()` Reset the stats.
`byte[]`	`smallestOutputKeyPrefix()` Get the smallest output key prefix.
`long`	`totalInputBytes()` Get the size of the compaction input in bytes.
`long`	`totalInputRawKeyBytes()` Get the sum of the uncompressed input keys in bytes.
`long`	`totalInputRawValueBytes()` Get the sum of the uncompressed input values in bytes.
`long`	`totalOutputBytes()` Get the size of the compaction output in bytes.

从类继承的方法 org.rocksdb.RocksObject
disposeInternal, getNativeHandle

从类继承的方法 org.rocksdb.AbstractImmutableNativeReference
close, disOwnNativeHandle, isOwningHandle

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - CompactionJobStats
```
public CompactionJobStats()
```
- 方法详细资料
  - reset
```
public void reset()
```
    Reset the stats.
  - add
```
public void add(CompactionJobStats compactionJobStats)
```
    Aggregate the CompactionJobStats from another instance with this one.
    
    参数:
    
    compactionJobStats - another instance of stats.
  - elapsedMicros
```
public long elapsedMicros()
```
    Get the elapsed time in micro of this compaction.
    
    返回:
    
    the elapsed time in micro of this compaction.
  - numInputRecords
```
public long numInputRecords()
```
    Get the number of compaction input records.
    
    返回:
    
    the number of compaction input records.
  - numInputFiles
```
public long numInputFiles()
```
    Get the number of compaction input files.
    
    返回:
    
    the number of compaction input files.
  - numInputFilesAtOutputLevel
```
public long numInputFilesAtOutputLevel()
```
    Get the number of compaction input files at the output level.
    
    返回:
    
    the number of compaction input files at the output level.
  - numOutputRecords
```
public long numOutputRecords()
```
    Get the number of compaction output records.
    
    返回:
    
    the number of compaction output records.
  - numOutputFiles
```
public long numOutputFiles()
```
    Get the number of compaction output files.
    
    返回:
    
    the number of compaction output files.
  - isManualCompaction
```
public boolean isManualCompaction()
```
    Determine if the compaction is a manual compaction.
    
    返回:
    
    true if the compaction is a manual compaction, false otherwise.
  - totalInputBytes
```
public long totalInputBytes()
```
    Get the size of the compaction input in bytes.
    
    返回:
    
    the size of the compaction input in bytes.
  - totalOutputBytes
```
public long totalOutputBytes()
```
    Get the size of the compaction output in bytes.
    
    返回:
    
    the size of the compaction output in bytes.
  - numRecordsReplaced
```
public long numRecordsReplaced()
```
    Get the number of records being replaced by newer record associated with same key. This could be a new value or a deletion entry for that key so this field sums up all updated and deleted keys.
    
    返回:
    
    the number of records being replaced by newer record associated with same key.
  - totalInputRawKeyBytes
```
public long totalInputRawKeyBytes()
```
    Get the sum of the uncompressed input keys in bytes.
    
    返回:
    
    the sum of the uncompressed input keys in bytes.
  - totalInputRawValueBytes
```
public long totalInputRawValueBytes()
```
    Get the sum of the uncompressed input values in bytes.
    
    返回:
    
    the sum of the uncompressed input values in bytes.
  - numInputDeletionRecords
```
public long numInputDeletionRecords()
```
    Get the number of deletion entries before compaction. Deletion entries can disappear after compaction because they expired.
    
    返回:
    
    the number of deletion entries before compaction.
  - numExpiredDeletionRecords
```
public long numExpiredDeletionRecords()
```
    Get the number of deletion records that were found obsolete and discarded because it is not possible to delete any more keys with this entry. (i.e. all possible deletions resulting from it have been completed)
    
    返回:
    
    the number of deletion records that were found obsolete and discarded.
  - numCorruptKeys
```
public long numCorruptKeys()
```
    Get the number of corrupt keys (ParseInternalKey returned false when applied to the key) encountered and written out.
    
    返回:
    
    the number of corrupt keys.
  - fileWriteNanos
```
public long fileWriteNanos()
```
    Get the Time spent on file's Append() call. Only populated if ColumnFamilyOptions.reportBgIoStats() is set.
    
    返回:
    
    the Time spent on file's Append() call.
  - fileRangeSyncNanos
```
public long fileRangeSyncNanos()
```
    Get the Time spent on sync file range. Only populated if ColumnFamilyOptions.reportBgIoStats() is set.
    
    返回:
    
    the Time spent on sync file range.
  - fileFsyncNanos
```
public long fileFsyncNanos()
```
    Get the Time spent on file fsync. Only populated if ColumnFamilyOptions.reportBgIoStats() is set.
    
    返回:
    
    the Time spent on file fsync.
  - filePrepareWriteNanos
```
public long filePrepareWriteNanos()
```
    Get the Time spent on preparing file write (falocate, etc) Only populated if ColumnFamilyOptions.reportBgIoStats() is set.
    
    返回:
    
    the Time spent on preparing file write (falocate, etc).
  - smallestOutputKeyPrefix
```
public byte[] smallestOutputKeyPrefix()
```
    Get the smallest output key prefix.
    
    返回:
    
    the smallest output key prefix.
  - largestOutputKeyPrefix
```
public byte[] largestOutputKeyPrefix()
```
    Get the largest output key prefix.
    
    返回:
    
    the smallest output key prefix.
  - numSingleDelFallthru
```
@Experimental(value="Performance optimization for a very specific workload")
public long numSingleDelFallthru()
```
    Get the number of single-deletes which do not meet a put.
    
    返回:
    
    number of single-deletes which do not meet a put.
  - numSingleDelMismatch
```
@Experimental(value="Performance optimization for a very specific workload")
public long numSingleDelMismatch()
```
    Get the number of single-deletes which meet something other than a put.
    
    返回:
    
    the number of single-deletes which meet something other than a put.
  - disposeInternal
```
protected void disposeInternal(long handle)
```
    指定者:
    
    disposeInternal 在类中 RocksObject

类 CompactionJobStats

字段概要

从类继承的字段 org.rocksdb.RocksObject

从类继承的字段 org.rocksdb.AbstractImmutableNativeReference

构造器概要

方法概要

从类继承的方法 org.rocksdb.RocksObject

从类继承的方法 org.rocksdb.AbstractImmutableNativeReference

从类继承的方法 java.lang.Object

构造器详细资料

CompactionJobStats

方法详细资料

reset

add

elapsedMicros

numInputRecords

numInputFiles

numInputFilesAtOutputLevel

numOutputRecords

numOutputFiles

isManualCompaction

totalInputBytes

totalOutputBytes

numRecordsReplaced

totalInputRawKeyBytes

totalInputRawValueBytes

numInputDeletionRecords

numExpiredDeletionRecords

numCorruptKeys

fileWriteNanos

fileRangeSyncNanos

fileFsyncNanos

filePrepareWriteNanos

smallestOutputKeyPrefix

largestOutputKeyPrefix

numSingleDelFallthru

numSingleDelMismatch

disposeInternal