java.lang.Object
- java.lang.Enum<RuntimeConfig.Field>
- - oracle.pgx.config.RuntimeConfig.Field

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<RuntimeConfig.Field>, ConfigField

Enclosing class:

RuntimeConfig
```
public static enum RuntimeConfig.Field
extends java.lang.Enum<RuntimeConfig.Field>
implements ConfigField
```
Fields of PGX Runtime Config

Enum Constant Summary

Enum Constants
Enum Constant	Description
`BFS_ITERATE_QUE_TASK_SIZE`	task size for BFS iterate QUE phase
`BFS_THRESHOLD_PARENT_READ_BASED`	threshold of BFS traversal level items above which to switch to parent-read-based visiting strategy
`BFS_THRESHOLD_READ_BASED`	threshold of BFS traversal level items above which to switch to read-based visiting strategy
`BFS_THRESHOLD_SINGLE_THREADED`	until what number of BFS traversal level items vertices are visited single-threaded
`CHARACTER_SET`	standard charset to use throughout PGX, UTF-8 will be used as default.
`CNI_DIFF_FACTOR_DEFAULT`	default diff factor value used in the common neighbor iterator implementations.
`CNI_SMALL_DEFAULT`	default value used in the common neighbor iterator implementations, to indicate below which threshold a subarray is considered small.
`CNI_STOP_RECURSION_DEFAULT`	default value used in the common neighbor iterator implementations, to indicate the minimum size where the binary search approach is applied.
`DFS_THRESHOLD_LARGE`	value that determines at which number of visited vertices the DFS implementation will switch to data-structures that are more optimized for larger numbers of vertices.
`ENTERPRISE_SCHEDULER_FLAGS`	[relevant for `enterprise_scheduler`] enterprise scheduler specific settings.
`EXPLICIT_SPIN_LOCKS`	`true` means spin explicitly in a loop until lock becomes available.
`GRAPH_VALIDATION_LEVEL`	level of validation performed on newly loaded or created graphs
`LARGE_ARRAY_THRESHOLD`	threshold when the size of an array is too big to use a normal Java array.
`MAX_DISTINCT_STRINGS_PER_POOL`	[only relevant if `string_pooling_strategy` is `indexed`] amount of distinct strings per property after which to stop pooling.
`MAX_OFF_HEAP_SIZE`	maximum amount of off-heap memory PGX is allowed to allocate in megabytes, before an OutOfMemoryError will be thrown.
`MAX_ON_HEAP_MEMORY_USAGE_RATIO`	maximum ratio of on-heap memory that PGX is allowed to use, between 0 and 1.
`MEMORY_ALLOCATOR`	which memory allocator to use
`MS_BFS_FRONTIER_TYPE_STRATEGY`	the type strategy to use for MS-BFS frontiers
`NUM_SPIN_LOCKS`	how many spin locks each generated app will create at instantiation.
`PARALLELISM`	number of worker threads to be used in thread pool.
`PATTERN_MATCHING_SUPERNODE_CACHE_THRESHOLD`	minimum number of a node's neighbor to be a supernode.
`POOLING_FACTOR`	[only relevant if `string_pooling_strategy` is `on_heap`] this value prevents the string pool to grow as big as the property size which could render the pooling ineffective
`RANDOM_GENERATOR_STRATEGY`	method of generating random numbers in pgx
`RANDOM_SEED`	[relevant for `deterministic` random number generator only] seed for the deterministic random number generator used in pgx.
`REVISIT_THRESHOLD`	maximum number of matched results from a node to be cached
`SCHEDULER`	which scheduler to use.
`SMALL_TASK_LENGTH`	task length if total amount of work is small than default task length (only relevant for task-stealing strategies)
`STRING_POOLING_STRATEGY`	which string pooling strategy to use
`TASK_LENGTH`	default task length (only relevant for task-stealing strategies).
`USE_INDEX_FOR_REACHABILITY_QUERIES`	create index for reachability queries
`USE_MEMORY_MAPPER_FOR_READING_PGB`	if `true`, use memory mapped files for reading graphs in PGB format if possible; `false` always use s stream based implementation
`USE_MEMORY_MAPPER_FOR_STORING_PGB`	if `true`, use memory mapped files for storing in PGB format if possible; if `false` always use a stream based implementation

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`getDefaultVal()`	Gets the default value of this field.
`java.util.List<java.lang.String>`	`getKeyAliases()`	Gets the key aliases of this field which are also recognized during parsing.
`java.util.List<java.lang.String>`	`getSingletonListKeyAliases()`	Gets the key aliases of this field which contain single values for lists and are also recognized during parsing.
`java.lang.Class<?>`	`getType()`	Gets the type of this field.
`boolean`	`isArray()`	Checks if this field is an array.
`boolean`	`isHidden()`	Checks if this field should be hidden.
`boolean`	`isPath()`	Checks if this field is a path.
`boolean`	`isRequired()`	Checks if this field is required.
`boolean`	`isSensitive()`	Checks if this field holds a sensitive data.
`java.lang.String`	`toKey()`	Get the key of this field, which is how this field is represented in serialized form.
`java.lang.String`	`toString()`
`static RuntimeConfig.Field`	`valueOf(java.lang.String name)`	Returns the enum constant of this type with the specified name.
`static RuntimeConfig.Field[]`	`values()`	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
compareTo, equals, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface oracle.pgx.config.ConfigField
isEnum, isPrimitive

- Enum Constant Detail
  - NUM_SPIN_LOCKS
```
public static final RuntimeConfig.Field NUM_SPIN_LOCKS
```
    how many spin locks each generated app will create at instantiation. Trade-off: small number implies less memory consumption. Big number implies faster execution (if algorithm uses spin locks)
  - EXPLICIT_SPIN_LOCKS
```
public static final RuntimeConfig.Field EXPLICIT_SPIN_LOCKS
```
    true means spin explicitly in a loop until lock becomes available. false means using JDK locks which rely on the JVM to decide whether to context switch or spin. Our experiments showed that setting this value to true results in better performance.
  - SCHEDULER
```
public static final RuntimeConfig.Field SCHEDULER
```
    which scheduler to use.
    basic_scheduler = use scheduler with basic features.
    enterprise_scheduler = use scheduler with advanced, enterprise features for running multiple tasks concurrently and increased performance.
    low_latency_scheduler = use scheduler that privileges latency of tasks over throughput or fairness across multiple sessions. The low_latency_scheduler is only available in embedded mode
  - TASK_LENGTH
```
public static final RuntimeConfig.Field TASK_LENGTH
```
    default task length (only relevant for task-stealing strategies). F/J pool documentation says this value should be between 100 and 10000. Trade-off: small number implies more fine-grained tasks are generated, higher stealing throughput. High number implies less memory consumption and GC activity
  - SMALL_TASK_LENGTH
```
public static final RuntimeConfig.Field SMALL_TASK_LENGTH
```
    task length if total amount of work is small than default task length (only relevant for task-stealing strategies)
  - MS_BFS_FRONTIER_TYPE_STRATEGY
```
public static final RuntimeConfig.Field MS_BFS_FRONTIER_TYPE_STRATEGY
```
    the type strategy to use for MS-BFS frontiers
  - BFS_THRESHOLD_SINGLE_THREADED
```
public static final RuntimeConfig.Field BFS_THRESHOLD_SINGLE_THREADED
```
    until what number of BFS traversal level items vertices are visited single-threaded
  - BFS_THRESHOLD_READ_BASED
```
public static final RuntimeConfig.Field BFS_THRESHOLD_READ_BASED
```
    threshold of BFS traversal level items above which to switch to read-based visiting strategy
  - BFS_ITERATE_QUE_TASK_SIZE
```
public static final RuntimeConfig.Field BFS_ITERATE_QUE_TASK_SIZE
```
    task size for BFS iterate QUE phase
  - BFS_THRESHOLD_PARENT_READ_BASED
```
public static final RuntimeConfig.Field BFS_THRESHOLD_PARENT_READ_BASED
```
    threshold of BFS traversal level items above which to switch to parent-read-based visiting strategy
  - DFS_THRESHOLD_LARGE
```
public static final RuntimeConfig.Field DFS_THRESHOLD_LARGE
```
    value that determines at which number of visited vertices the DFS implementation will switch to data-structures that are more optimized for larger numbers of vertices.
  - CNI_STOP_RECURSION_DEFAULT
```
public static final RuntimeConfig.Field CNI_STOP_RECURSION_DEFAULT
```
    default value used in the common neighbor iterator implementations, to indicate the minimum size where the binary search approach is applied.
  - CNI_SMALL_DEFAULT
```
public static final RuntimeConfig.Field CNI_SMALL_DEFAULT
```
    default value used in the common neighbor iterator implementations, to indicate below which threshold a subarray is considered small.
  - CNI_DIFF_FACTOR_DEFAULT
```
public static final RuntimeConfig.Field CNI_DIFF_FACTOR_DEFAULT
```
    default diff factor value used in the common neighbor iterator implementations.
  - LARGE_ARRAY_THRESHOLD
```
public static final RuntimeConfig.Field LARGE_ARRAY_THRESHOLD
```
    threshold when the size of an array is too big to use a normal Java array. This depends on the used JVM. (defaults to Integer.MAX_VALUE - 3)
  - MAX_OFF_HEAP_SIZE
```
public static final RuntimeConfig.Field MAX_OFF_HEAP_SIZE
```
    maximum amount of off-heap memory PGX is allowed to allocate in megabytes, before an OutOfMemoryError will be thrown. Note: this limit is not guaranteed to never be exceeded because of rounding and synchronization trade-offs. It only serves as threshold when PGX starts to reject new memory allocation requests.
  - MAX_ON_HEAP_MEMORY_USAGE_RATIO
```
public static final RuntimeConfig.Field MAX_ON_HEAP_MEMORY_USAGE_RATIO
```
    maximum ratio of on-heap memory that PGX is allowed to use, between 0 and 1.
  - CHARACTER_SET
```
public static final RuntimeConfig.Field CHARACTER_SET
```
    standard charset to use throughout PGX, UTF-8 will be used as default. Note: Some formats may not be compatible.
  - PARALLELISM
```
public static final RuntimeConfig.Field PARALLELISM
```
    number of worker threads to be used in thread pool. Note: if caller thread is part of another thread-pool, this value is ignored and parallelism of parent pool is used.
  - RANDOM_GENERATOR_STRATEGY
```
public static final RuntimeConfig.Field RANDOM_GENERATOR_STRATEGY
```
    method of generating random numbers in pgx
  - RANDOM_SEED
```
public static final RuntimeConfig.Field RANDOM_SEED
```
    [relevant for deterministic random number generator only] seed for the deterministic random number generator used in pgx. The default is -24466691093057031
  - PATTERN_MATCHING_SUPERNODE_CACHE_THRESHOLD
```
public static final RuntimeConfig.Field PATTERN_MATCHING_SUPERNODE_CACHE_THRESHOLD
```
    minimum number of a node's neighbor to be a supernode. This is for pattern matching engine.
  - USE_INDEX_FOR_REACHABILITY_QUERIES
```
public static final RuntimeConfig.Field USE_INDEX_FOR_REACHABILITY_QUERIES
```
    create index for reachability queries
  - REVISIT_THRESHOLD
```
public static final RuntimeConfig.Field REVISIT_THRESHOLD
```
    maximum number of matched results from a node to be cached
  - ENTERPRISE_SCHEDULER_FLAGS
```
public static final RuntimeConfig.Field ENTERPRISE_SCHEDULER_FLAGS
```
    [relevant for enterprise_scheduler] enterprise scheduler specific settings.
  - MEMORY_ALLOCATOR
```
public static final RuntimeConfig.Field MEMORY_ALLOCATOR
```
    which memory allocator to use
  - MAX_DISTINCT_STRINGS_PER_POOL
```
public static final RuntimeConfig.Field MAX_DISTINCT_STRINGS_PER_POOL
```
    [only relevant if string_pooling_strategy is indexed] amount of distinct strings per property after which to stop pooling. If the limit is reached an exception is thrown
  - STRING_POOLING_STRATEGY
```
public static final RuntimeConfig.Field STRING_POOLING_STRATEGY
```
    which string pooling strategy to use
  - USE_MEMORY_MAPPER_FOR_STORING_PGB
```
public static final RuntimeConfig.Field USE_MEMORY_MAPPER_FOR_STORING_PGB
```
    if true, use memory mapped files for storing in PGB format if possible; if false always use a stream based implementation
  - USE_MEMORY_MAPPER_FOR_READING_PGB
```
public static final RuntimeConfig.Field USE_MEMORY_MAPPER_FOR_READING_PGB
```
    if true, use memory mapped files for reading graphs in PGB format if possible; false always use s stream based implementation
  - POOLING_FACTOR
```
public static final RuntimeConfig.Field POOLING_FACTOR
```
    [only relevant if string_pooling_strategy is on_heap] this value prevents the string pool to grow as big as the property size which could render the pooling ineffective
  - GRAPH_VALIDATION_LEVEL
```
public static final RuntimeConfig.Field GRAPH_VALIDATION_LEVEL
```
    level of validation performed on newly loaded or created graphs
- Method Detail
  - values
```
public static RuntimeConfig.Field[] 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 (RuntimeConfig.Field c : RuntimeConfig.Field.values()) System.out.println(c);
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static RuntimeConfig.Field valueOf(java.lang.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:
    
    java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
    
    java.lang.NullPointerException - if the argument is null
  - getKeyAliases
```
public java.util.List<java.lang.String> getKeyAliases()
```
    Description copied from interface: ConfigField
    
    Gets the key aliases of this field which are also recognized during parsing.
    
    Specified by:
    
    getKeyAliases in interface ConfigField
    
    Returns:
    
    the key aliases
  - getSingletonListKeyAliases
```
public java.util.List<java.lang.String> getSingletonListKeyAliases()
```
    Description copied from interface: ConfigField
    
    Gets the key aliases of this field which contain single values for lists and are also recognized during parsing.
    
    Specified by:
    
    getSingletonListKeyAliases in interface ConfigField
    
    Returns:
    
    the singleton list key aliases
  - getType
```
public java.lang.Class<?> getType()
```
    Description copied from interface: ConfigField
    
    Gets the type of this field.
    
    Specified by:
    
    getType in interface ConfigField
    
    Returns:
    
    the type
  - isRequired
```
public boolean isRequired()
```
    Description copied from interface: ConfigField
    
    Checks if this field is required.
    
    Specified by:
    
    isRequired in interface ConfigField
    
    Returns:
    
    true, if required
  - isArray
```
public boolean isArray()
```
    Description copied from interface: ConfigField
    
    Checks if this field is an array.
    
    Specified by:
    
    isArray in interface ConfigField
    
    Returns:
    
    true, if array
  - isPath
```
public boolean isPath()
```
    Description copied from interface: ConfigField
    
    Checks if this field is a path.
    
    Specified by:
    
    isPath in interface ConfigField
    
    Returns:
    
    true, if path
  - getDefaultVal
```
public java.lang.Object getDefaultVal()
```
    Description copied from interface: ConfigField
    
    Gets the default value of this field.
    
    Specified by:
    
    getDefaultVal in interface ConfigField
    
    Returns:
    
    the default value
  - toKey
```
public java.lang.String toKey()
```
    Description copied from interface: ConfigField
    
    Get the key of this field, which is how this field is represented in serialized form.
    
    Specified by:
    
    toKey in interface ConfigField
    
    Returns:
    
    the key.
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Enum<RuntimeConfig.Field>
  - isSensitive
```
public boolean isSensitive()
```
    Description copied from interface: ConfigField
    
    Checks if this field holds a sensitive data.
    
    Specified by:
    
    isSensitive in interface ConfigField
    
    Returns:
    
    true, if use for sensitive data
  - isHidden
```
public boolean isHidden()
```
    Description copied from interface: ConfigField
    
    Checks if this field should be hidden. Hidden fields are used to hid desired field from the user and only allow it for internal usage.
    
    Specified by:
    
    isHidden in interface ConfigField
    
    Returns:
    
    true if field should be hidden, false otherwise

Enum RuntimeConfig.Field

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Methods inherited from interface oracle.pgx.config.ConfigField

Enum Constant Detail

NUM_SPIN_LOCKS

EXPLICIT_SPIN_LOCKS

SCHEDULER

TASK_LENGTH

SMALL_TASK_LENGTH

MS_BFS_FRONTIER_TYPE_STRATEGY

BFS_THRESHOLD_SINGLE_THREADED

BFS_THRESHOLD_READ_BASED

BFS_ITERATE_QUE_TASK_SIZE

BFS_THRESHOLD_PARENT_READ_BASED

DFS_THRESHOLD_LARGE

CNI_STOP_RECURSION_DEFAULT

CNI_SMALL_DEFAULT

CNI_DIFF_FACTOR_DEFAULT

LARGE_ARRAY_THRESHOLD

MAX_OFF_HEAP_SIZE

MAX_ON_HEAP_MEMORY_USAGE_RATIO

CHARACTER_SET

PARALLELISM

RANDOM_GENERATOR_STRATEGY

RANDOM_SEED

PATTERN_MATCHING_SUPERNODE_CACHE_THRESHOLD

USE_INDEX_FOR_REACHABILITY_QUERIES

REVISIT_THRESHOLD

ENTERPRISE_SCHEDULER_FLAGS

MEMORY_ALLOCATOR

MAX_DISTINCT_STRINGS_PER_POOL

STRING_POOLING_STRATEGY

USE_MEMORY_MAPPER_FOR_STORING_PGB

USE_MEMORY_MAPPER_FOR_READING_PGB

POOLING_FACTOR

GRAPH_VALIDATION_LEVEL

Method Detail

values

valueOf

getKeyAliases

getSingletonListKeyAliases

getType

isRequired

isArray

isPath

getDefaultVal

toKey

toString

isSensitive

isHidden