System tuning
After efficiently implementing application programs, further improvements in the overall performance of your system becomes a matter of system tuning.
The main components that are subject to system-level tuning are:
- Communications I/O
- Depending on the type of workload and the type of communications link, it might be necessary to tune one or more of the following communications device drivers: TCP/IP, or NFS.
- Fixed Disk
- The Logical Volume Manager (LVM) controls the placement of file systems and paging spaces on the disk, which can significantly affect the amount of seek latency the system experiences. The disk device drivers control the order in which I/O requests are acted upon.
- Real Memory
- The Virtual Memory Manager (VMM) controls the pool of free real-memory frames and determines when and from where to steal frames to replenish the pool.
- Running Thread
- The scheduler determines which dispatchable entity should next receive control. In AIX®, the dispatchable entity is a thread. See Thread support.