A network flow processor integrated circuit includes a plurality of processors, a plurality of multi-threaded transactional memories (MTMs), and a configurable mesh posted transaction data bus. The configurable mesh posted transaction data bus includes a configurable command mesh and a configurable data mesh. Each of these configurable meshes includes crossbar switches and interconnecting links. A command bus transaction value issued by a processor can pass across the command mesh to an MTM. The command bus transaction bus value includes a reference value. The MTM uses the reference value to pull data across the configurable data mesh into the MTM. The MTM then uses the data to carry out the commanded transactional memory operation. Multiple such commands can pass across the posted transaction bus across different parts of the integrated circuit at the same time, and a single MTM can be carrying out multiple such operations at the same time.