TCP and UDP performance tuning
The optimal settings of the tunable communications parameters vary with the type of LAN, as well as with the communications-I/O characteristics of the predominant system and application programs. This section describes the global principles of communications tuning for AIX®.
Use the following outline for verifying and tuning a network installation and workload:
- Ensure adapters are placed in the proper slots.
- Ensure system firmware is at the proper release level
- Ensure adapter and network switches are in proper speed and duplex mode
- Ensure correct MTU size has been selected
- Adjust AIX tunables for network type, speed, and protocol
- Other considerations:
- Adapter offload options
- TCP checksum offload
- TCP large send or re-segmentation
- Interrupt coalescing
- Input threads (Dog threads)
- Adapter offload options