HashStats (Oracle - Berkeley DB Java API)

java.lang.Object
- com.sleepycat.db.DatabaseStats
- - com.sleepycat.db.HashStats

```
public class HashStats
extends DatabaseStats
```
The HashStats object is used to return Hash database statistics.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`getBFree()`	The number of bytes free on bucket pages.
`long`	`getBigBFree()`	The number of bytes free on hash overflow (big item) pages.
`int`	`getBigPages()`	The number of hash overflow pages (created when key/data is too big for the page).
`int`	`getBuckets()`	The number of hash buckets.
`int`	`getDup()`	The number of duplicate pages.
`long`	`getDupFree()`	The number of bytes free on duplicate pages.
`int`	`getExtFiles()`	The number of external files.
`int`	`getFfactor()`	The desired fill factor specified at database-creation time.
`int`	`getFree()`	The number of pages on the free list.
`int`	`getMagic()`	The magic number that identifies the file as a Hash file.
`int`	`getMetaFlags()`	Reports internal flags.
`int`	`getNumBlobs()`
`int`	`getNumData()`	The number of key/data pairs in the database.
`int`	`getNumKeys()`	The number of unique keys in the database.
`int`	`getOverflows()`	The number of bucket overflow pages (bucket overflow pages are created when items did not fit on the main bucket page).
`long`	`getOvflFree()`	The number of bytes free on bucket overflow pages.
`int`	`getPageCount()`	The number of pages in the database.
`int`	`getPageSize()`	The underlying Hash database page (and bucket) size, in bytes.
`int`	`getVersion()`	The version of the Hash database.
`java.lang.String`	`toString()`	For convenience, the HashStats class has a toString method that lists all the data fields.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Method Detail
  - getMagic
```
public int getMagic()
```
    The magic number that identifies the file as a Hash file.
    
    Returns:
    
    the magic number that identifies the files as a Hash file
  - getVersion
```
public int getVersion()
```
    The version of the Hash database.
    
    Returns:
    
    the version of the Hash database
  - getMetaFlags
```
public int getMetaFlags()
```
    Reports internal flags. For internal use only.
    
    Returns:
    
    internal flags
  - getNumKeys
```
public int getNumKeys()
```
    The number of unique keys in the database.
    If the Database.getStats call was configured by the StatsConfig.setFast method, the count will be the last saved value unless it has never been calculated, in which case it will be 0.
    
    Returns:
    
    the number of unique keys in the database
  - getNumData
```
public int getNumData()
```
    The number of key/data pairs in the database.
    If the Database.getStats call was configured by the StatsConfig.setFast method, the count will be the last saved value unless it has never been calculated, in which case it will be 0.
    
    Returns:
    
    the number of key/data pairs in the database
  - getExtFiles
```
public int getExtFiles()
```
    The number of external files.
    
    Returns:
    
    the number of external files
  - getNumBlobs
```
public int getNumBlobs()
```
  - getPageCount
```
public int getPageCount()
```
    The number of pages in the database.
    Returned if StatsConfig.setFast(boolean) was configured.
    
    Returns:
    
    the number of pages in the database
  - getPageSize
```
public int getPageSize()
```
    The underlying Hash database page (and bucket) size, in bytes.
    
    Returns:
    
    the underlying Hash database page (and bucket) size, in bytes
  - getFfactor
```
public int getFfactor()
```
    The desired fill factor specified at database-creation time.
    
    Returns:
    
    the desired fill factor specified at database-creation time
  - getBuckets
```
public int getBuckets()
```
    The number of hash buckets.
    
    Returns:
    
    the number of hash buckets
  - getFree
```
public int getFree()
```
    The number of pages on the free list.
    The information is only included if the Database.getStats call was not configured by the StatsConfig.setFast method.
    
    Returns:
    
    the number of pages on the free list
  - getBFree
```
public long getBFree()
```
    The number of bytes free on bucket pages.
    The information is only included if the Database.getStats call was not configured by the StatsConfig.setFast method.
    
    Returns:
    
    the number of bytes free on bucket pages
  - getBigPages
```
public int getBigPages()
```
    The number of hash overflow pages (created when key/data is too big for the page).
    The information is only included if the Database.getStats call was not configured by the StatsConfig.setFast method.
    
    Returns:
    
    the number of hash overflow pages
  - getBigBFree
```
public long getBigBFree()
```
    The number of bytes free on hash overflow (big item) pages.
    The information is only included if the Database.getStats call was not configured by the StatsConfig.setFast method.
    
    Returns:
    
    the number of bytes free on hash overflow pages
  - getOverflows
```
public int getOverflows()
```
    The number of bucket overflow pages (bucket overflow pages are created when items did not fit on the main bucket page).
    The information is only included if the Database.getStats call was not configured by the StatsConfig.setFast method.
    
    Returns:
    
    the number of bucket overflow pages
  - getOvflFree
```
public long getOvflFree()
```
    The number of bytes free on bucket overflow pages.
    The information is only included if the Database.getStats call was not configured by the StatsConfig.setFast method.
    
    Returns:
    
    the number of bytes free on bucket overflow pages
  - getDup
```
public int getDup()
```
    The number of duplicate pages.
    The information is only included if the Database.getStats call was not configured by the StatsConfig.setFast method.
    
    Returns:
    
    the number of duplicate pages
  - getDupFree
```
public long getDupFree()
```
    The number of bytes free on duplicate pages.
    The information is only included if the Database.getStats call was not configured by the StatsConfig.setFast method.
    
    Returns:
    
    the number of bytes free on duplicate pages
  - toString
```
public java.lang.String toString()
```
    For convenience, the HashStats class has a toString method that lists all the data fields.
    
    Overrides:
    
    toString in class java.lang.Object
    
    Returns:
    
    a String that lists all the data fields

Class HashStats

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getMagic

getVersion

getMetaFlags

getNumKeys

getNumData

getExtFiles

getNumBlobs

getPageCount

getPageSize

getFfactor

getBuckets

getFree

getBFree

getBigPages

getBigBFree

getOverflows

getOvflFree

getDup

getDupFree

toString