The elapsed time to run IMS™ HP
Prefix Resolution depends on a variety of factors, and you can improve
the performance in a number of ways.
The following factors affect performance:
- Certain options and parameters in JCL streams
- Number of DFSURWF1 logical pointer records
- Number of DFSURWF1 secondary index records
- Available REGION size
- Quality of the sort program installed and the sort installation
options
- Control statements XFILSZ, XAVGRLEN, FILSZ, AVGRLEN,
and TYPE
- Number of buffers specified for DFSURWF1, DFSURWF3, and DFSURIDX
data sets
- Blocking factor used for creation of DFSURWF1 in initial load,
reload or scan
- Blocking factor used for creation of DFSURWF3 or DFSURIDX data
set
- Availability of your system
- Type of CPU