Flow control ensures that the rate at which messages are transmitted from the publisher to the receiver is controlled. Back-pressure is exerted when the defined global memory threshold or message count threshold per connection is exceeded. At this point, message acceptance is blocked until the sender is notified of memory recovery. In the meantime, a background process constantly checks whether the memory is recovered, and when the memory is available the sender is notified and can resume sending messages to the server. Flow control configurations are defined in the <MB_HOME>/repository/conf/advanced/andes-config.xml file.
