Sample Memory Management QoS

Use these QoS fields to configure how Connext manages memory related to the samples that are stored and managed by the DataReader and DataWriter queues.

Use these QoS fields to configure how Connext manages memory related to the samples that are stored and managed by the DataReader and DataWriter queues.

Basic Settings

dds::core::policy::ResourceLimits	max_samples
	<<basic>> <<spec>> Represents the maximum samples the middleware can store for any one dds::pub::DataWriter (or dds::sub::DataReader).
dds::core::policy::ResourceLimits	max_instances
	<<basic>> <<spec>> Represents the maximum number of instances a dds::pub::DataWriter (or dds::sub::DataReader) can manage.
dds::core::policy::ResourceLimits	initial_samples
	<<basic>> <<extension>> Represents the initial samples the middleware will store for any one dds::pub::DataWriter (or dds::sub::DataReader).
dds::core::policy::ResourceLimits	initial_instances
	<<basic>> <<extension>> Represents the initial number of instances a dds::pub::DataWriter (or dds::sub::DataReader) will manage.

Advanced Settings

rti::core::PersistentStorageSettings	writer_instance_cache_allocation
	<<extension>> Configures the resource limits associated with the instance durable writer history cache.
rti::core::PersistentStorageSettings	writer_sample_cache_allocation
	<<extension>> Configures the resource limits associated with the sample durable writer history cache.
dds::core::policy::DurabilityService	history_kind
	<<spec>> The kind of history to apply in recouping durable data.
dds::core::policy::DurabilityService	history_depth
	<<spec>> Setting to use for the dds::core::policy::Durability::writer_depth when recouping durable data.
dds::core::policy::DurabilityService	max_samples
	<<spec>> Part of resource limits QoS policy to apply when feeding a late joiner.
dds::core::policy::DurabilityService	max_instances
	<<spec>> Part of resource limits QoS policy to apply when feeding a late joiner.
dds::core::policy::DurabilityService	max_samples_per_instance
	<<spec>> Part of resource limits QoS policy to apply when feeding a late joiner.
dds::core::policy::ResourceLimits	max_samples_per_instance
	<<spec>> Represents the maximum number of samples of any one instance a dds::pub::DataWriter (or dds::sub::DataReader) can manage.
dds::core::policy::WriterDataLifecycle	autodispose_unregistered_instances
	<<spec>> Boolean flag that controls whether or not a writer will also dispose of an instance when the dds::pub::DataWriter unregisters from the instance by means of the unregister operations.
dds::core::policy::WriterDataLifecycle	autopurge_unregistered_instances_delay
	<<extension>> Maximum duration for which the dds::pub::DataWriter will maintain information regarding an instance once it has unregistered the instance.
dds::core::policy::WriterDataLifecycle	autopurge_disposed_instances_delay
	<<extension>> Maximum duration for which the dds::pub::DataWriter will maintain information regarding an instance once it has disposed the instance.
dds::core::policy::ReaderDataLifecycle	autopurge_nowriter_samples_delay
	<<spec>> Minimum duration for which the dds::sub::DataReader will maintain samples for an instance once its instance_state becomes dds::sub::status::InstanceState::not_alive_no_writers().
dds::core::policy::ReaderDataLifecycle	autopurge_disposed_samples_delay
	<<spec>> Minimum duration for which the dds::sub::DataReader will maintain samples for an instance once its instance_state becomes dds::sub::status::InstanceState::not_alive_disposed().
dds::core::policy::ReaderDataLifecycle	autopurge_disposed_instances_delay
	<<extension>> Minimum duration for which the dds::sub::DataReader will maintain information about a received instance once its instance_state becomes dds::sub::status::InstanceState::not_alive_disposed() and there are no samples for the instance in the DataReader queue.
dds::core::policy::ReaderDataLifecycle	autopurge_nowriter_instances_delay
	<<extension>> Minimum duration for which the dds::sub::DataReader will maintain information about a received instance once its instance_state becomes dds::sub::status::InstanceState::not_alive_no_writers() and there are no samples for the instance in the DataReader queue.
rti::core::policy::DataReaderResourceLimits	max_fragmented_samples
	<<extension>> The maximum number of samples for which the dds::sub::DataReader may store fragments at a given point in time.
rti::core::policy::DataReaderResourceLimits	initial_fragmented_samples
	<<extension>> The initial number of samples for which a dds::sub::DataReader may store fragments.
rti::core::policy::DataReaderResourceLimits	max_fragmented_samples_per_remote_writer
	<<extension>> The maximum number of samples per remote writer for which a dds::sub::DataReader may store fragments.
rti::core::policy::DataReaderResourceLimits	max_fragments_per_sample
	<<extension>> Maximum number of fragments for a single sample.
rti::core::policy::DataReaderResourceLimits	dynamically_allocate_fragmented_samples
	<<extension>> Determines whether the dds::sub::DataReader pre-allocates storage for storing fragmented samples.
rti::core::policy::DataWriterResourceLimits	initial_batches
	<<extension>> Represents the initial number of batches a dds::pub::DataWriter will manage.
rti::core::policy::DataWriterResourceLimits	max_batches
	<<extension>> Represents the maximum number of batches a dds::pub::DataWriter will manage.
rti::core::policy::DataWriterResourceLimits	writer_loaned_sample_allocation
	<<extension>> Represents the allocation settings of loaned samples managed by a dds::pub::DataWriter.
rti::core::policy::DataWriterResourceLimits	initialize_writer_loaned_sample
	<<extension>> Whether or not to initialize loaned samples returned by a dds::pub::DataWriter
rti::core::policy::DiscoveryConfig	participant_reader_resource_limits
	<<extension>> Resource limits.
rti::core::policy::DiscoveryConfig	publication_reader_resource_limits
	<<extension>> Resource limits.
rti::core::policy::DiscoveryConfig	subscription_reader_resource_limits
	<<extension>> Resource limits.
rti::core::policy::DiscoveryConfig	participant_configuration_reader_resource_limits
	<<extension>> Resource limits for the built-in topic participant configuration reader.
rti::core::policy::BuiltinTopicReaderResourceLimits	initial_samples
	<<extension>> Initial number of samples.
rti::core::policy::BuiltinTopicReaderResourceLimits	max_samples
	<<extension>> Maximum number of samples.