-tmpcompress

 

Syntax	-tmpcompress
Description	Compresses certain temporary files during the collect/preprocess/output sort phase.
Comment	More CPU resources are used when using this argument, but less writing to disk is performed. This means if you have really fast CPUs and slow disks, this argument can increase performance considerably. In the unlikely case that you have slow CPUs and fast disks, it could do nothing, or decrease overall performance slightly. If a system's disk cache has a high hit rate, and does not fill up, this argument is usually unnecessary. This is often the case with realtime jobs. If, during times of peak load, disk utilization is high but CPU utilization is low, then this argument will usually help. This is often the case with batch jobs, particularly large ones.