PSF (/var/psf/segments)
As described in Print jobs and print files, PSF Input Manager segments AFP files so printing can start before a job completes ripping. The smaller the segments, the faster PSF starts printing the job. However, if the pieces get too small, there will be too many files and too much disk thrashing. If PSF has to open a new file for each page that can slow things down significantly.
The default setting of 5000KB for each segment can be raised to reduce
the disk I/O associated with reading and writing data to the /var/psf/segments
file
system; however, the default setting usually works well with most AFP production
applications.
The InfoPrint Manager SMIT Customize
the Input Manager panel (InfoPrint Manager
→ Miscellaneous → Customize the Input Manager
) lets you change
the default segment size. The segment size parameter determines the maximum
size of any temporary file created by the Input Manager component of InfoPrint Manager that is stored
in /var/psf/segments
. This parameter should only be
adjusted when there is a problem with throughput.
Since there are so many small files stored in /var/psf/segments
,
y