[Users] Question about the treatment of incoming messages

Hello, I have a question about the behaviour of OpenSER while treating incoming messages. This question may be a detail for most of the people here, but I think that it has an impact on the dimensioning of an OpenSER setup, especially if it is used to treat a large number of users / messages. I would like to know if Openser is able to store incoming messages in a queue when all the children launched by the program are occupied, or if the messages are rejected when no threads are available to treat them. For instance, if I launch openser with children=5 and these 5 children threads are occupied when a SIP message arrives, is the message rejected or is it stored in a FIFO queue ? In addition, I would be interested to know which part of the code is relevant to look at to deal with this issue. Thanks in advance for all your remarks and answers about my question. Antoine Fressancourt