Package org.forgerock.opendj.server.config.meta

Enum JeBackendCfgDefn.DbCacheMode

java.lang.Object

java.lang.Enum<JeBackendCfgDefn.DbCacheMode>

org.forgerock.opendj.server.config.meta.JeBackendCfgDefn.DbCacheMode

All Implemented Interfaces:

Serializable, Comparable<JeBackendCfgDefn.DbCacheMode>

Enclosing class:

JeBackendCfgDefn

public static enum JeBackendCfgDefn.DbCacheMode
extends Enum<JeBackendCfgDefn.DbCacheMode>

Defines the set of permissible values for the "db-cache-mode" property.

The strategy that will be used for caching database content in memory.

Specifies whether the database heap cache should keep only internal nodes or both internal and leaf nodes.

Enum Constant Summary

Enum Constants

Enum Constant	Description
ADAPTIVE	Regularly check the database and cache metrics and set the best cache mode accordingly.
CACHE_LN	Keep both internal and leaf nodes in the database heap cache.
EVICT_LN	Keep only internal nodes in the database heap cache.

Method Summary

Modifier and Type	Method	Description
String	toString()
static JeBackendCfgDefn.DbCacheMode	valueOf(String name)	Returns the enum constant of this type with the specified name.
static JeBackendCfgDefn.DbCacheMode[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

ADAPTIVE

public static final JeBackendCfgDefn.DbCacheMode ADAPTIVE

Regularly check the database and cache metrics and set the best cache mode accordingly.

CACHE_LN

public static final JeBackendCfgDefn.DbCacheMode CACHE_LN

Keep both internal and leaf nodes in the database heap cache. This can improve performance when the database is relatively small and when the database fits entirely into the database cache. This mode requires the cache to be rebuilt after each restart.

EVICT_LN

public static final JeBackendCfgDefn.DbCacheMode EVICT_LN

Keep only internal nodes in the database heap cache. Leaf nodes will only be cached by the file system. This mode improves performance most when the database is too big to fit entirely into the database cache, or when the cache size would require an overly large JVM heap. This mode has the advantage of keeping the cache hot between restarts.

Method Detail

values

public static JeBackendCfgDefn.DbCacheMode[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (JeBackendCfgDefn.DbCacheMode c : JeBackendCfgDefn.DbCacheMode.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static JeBackendCfgDefn.DbCacheMode valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

toString

public String toString()

Overrides:

toString in class Enum<JeBackendCfgDefn.DbCacheMode>