Package com.sleepycat.db

Class StatsConfig

java.lang.Object
com.sleepycat.db.StatsConfig
public class StatsConfig extends Object
Specifies the attributes of a statistics retrieval operation.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final StatsConfig
    DEFAULT
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    StatsConfig()
    An instance created using the default constructor is initialized with the system's default settings.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    getClear()
    Return if the statistics operation is configured to reset statistics after they are returned.
    boolean
    getFast()
    Return if the statistics operation is configured to return only the values which do not require expensive actions.
    void
    setClear(boolean clear)
    Configure the statistics operation to reset statistics after they are returned.
    void
    setFast(boolean fast)
    Configure the statistics operation to return only the values which do not incur some performance penalty.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

  • Constructor Details

    • StatsConfig

      public StatsConfig()
      An instance created using the default constructor is initialized with the system's default settings.

  • Method Details

    • setClear

      public void setClear(boolean clear)
      Configure the statistics operation to reset statistics after they are returned. The default value is false.

      Parameters:
      clear - If set to true, configure the statistics operation to reset statistics after they are returned.

    • getClear

      public boolean getClear()
      Return if the statistics operation is configured to reset statistics after they are returned.

      Returns:
      If the statistics operation is configured to reset statistics after they are returned.

    • setFast

      public void setFast(boolean fast)
      Configure the statistics operation to return only the values which do not incur some performance penalty.

      The default value is false.

      For example, skip stats that require a traversal of the database or in-memory tree, or which lock down the lock table for a period of time.

      Among other things, this flag makes it possible for applications to request key and record counts without incurring the performance penalty of traversing the entire database. If the underlying database is of type Recno, or of type Btree and the database was configured to support retrieval by record number, the count of keys will be exact. Otherwise, the count of keys will be the value saved the last time the database was traversed, or 0 if no count of keys has ever been made. If the underlying database is of type Recno, the count of data items will be exact, otherwise, the count of data items will be the value saved the last time the database was traversed, or 0 if no count of data items has ever been done.

      Parameters:
      fast - If set to true, configure the statistics operation to return only the values which do not incur some performance penalty.

    • getFast

      public boolean getFast()
      Return if the statistics operation is configured to return only the values which do not require expensive actions.

      Returns:
      If the statistics operation is configured to return only the values which do not require expensive actions.