In UNIX and Linux systems, the Client daemon communicates internally using inter-process communication message queues.
In systems other than AIX®, the default configuration settings for these queues are too small to allow for large client data flows (such as 3270 maps or user COMMAREAs). Some symptoms of this problem are:
Change the configuration settings of the message queues to allow for large client data flows. The way that you do this depends on your operating system.