.. _`DDS_DomainParticipantFactory_get_instance()`: ../../api_c/html/group__DDSDomainParticipantFactoryModule.html#gac874268715a20b82db24d26d7fbae965
.. _`DDS_WaitSet_new()`: ../../api_c/html/group__DDSConditionsModule.html#ga5490c5e53e46790c2823d43310141c7b
.. _`DDS_DomainParticipantFactory_create_participant()`: ../../api_c/html/group__DDSDomainParticipantFactoryModule.html#ga325cf8f97a2752b6f486b7b1c3faf5b8
.. _`DDS_DomainParticipantFactory_finalize_instance()`: ../../api_c/html/group__DDSDomainParticipantFactoryModule.html#ga925b60f4abd015d1ecd3a389feebfa6c
.. _`OSAPI_Waitset_delete()`: ../../api_c/html/group__DDSConditionsModule.html#ga06bf93bc3887f0f5b92ddcfa4f5bfa18
.. _`DDS_String_free()`: ../../api_c/html/group__DDSStringClass.html#ga13074f0132f743923a4a36ee533997fe
.. _`Configuring Resource Limits`: ../../api_c/html/group__DDSUserManuals__ResourceModule.html

Internal Resource Allocation
============================

|me| allocates additional resources to entities based on internal needs. As a 
result, resource limits set by the user will often appear to have increased by a 
constant when read back. This is because |me| uses additional internal readers and 
other entities. |me| takes the user-defined value and adds a constant depending on 
the resource limit, topic and entity being used. For specific values, consult the 
table below. 

See :ref:`Heap Usage` for further details on the amount of memory used by each 
resource limit in the memory model.

.. table:: |me| Internal resource limit Modifications
  :widths: auto

  +--------------------------------------------+------------------------------------------------------------------+
  | resource limit                             | Modifications by Feature                                         |
  +============================================+==========================+=======================================+
  | ``local_topic_allocation``                 | DPSE [1]_                | 1                                     |
  |                                            +--------------------------+---------------------------------------+
  |                                            | DPDE [2]_                | 3                                     |
  +--------------------------------------------+--------------------------+---------------------------------------+
  | ``local_type_allocation``                  | DPSE                     | 1                                     |
  |                                            +--------------------------+---------------------------------------+
  |                                            | DPDE                     | 3                                     |
  +--------------------------------------------+--------------------------+---------------------------------------+
  | ``local_writer_allocation``                | DPSE                     | 1                                     |
  |                                            +--------------------------+---------------------------------------+
  |                                            | DPDE                     | 3                                     |
  +--------------------------------------------+--------------------------+---------------------------------------+
  | ``local_reader_allocation``                | DPSE                     | 1                                     |
  |                                            +--------------------------+---------------------------------------+
  |                                            | DPDE                     | 3                                     |
  +--------------------------------------------+--------------------------+---------------------------------------+
  | ``local_publisher_allocation``             | DPSE                     | 1                                     |
  |                                            +--------------------------+---------------------------------------+
  |                                            | DPDE                     | 1                                     |
  +--------------------------------------------+--------------------------+---------------------------------------+
  | ``local_subscriber_allocation``            | DPSE                     | 1                                     |
  |                                            +--------------------------+---------------------------------------+
  |                                            | DPDE                     | 1                                     |
  +--------------------------------------------+--------------------------+---------------------------------------+
  | ``matching_writer_reader_pair_allocation`` | DPSE                     | 1                                     |
  |                                            +--------------------------+---------------------------------------+
  |                                            | DPDE                     | ``remote_participant_allocation`` * 6 |
  +--------------------------------------------+--------------------------+---------------------------------------+

.. [1] Dynamic Participant Static Endpoint. Not used concurrently with DPDE.
.. [2] Dynamic Participant Dynamic Endpoint. Not used concurrently with DPSE.