Reload Analyzer Manual

Tandem Reload Analyzer Manual Page 37 of 42
You need to weigh the benefits of reloading the file against the costs of reloading. The
cost of reloading a file is significant and includes the following:
 Performance degradation of processes that are using the file while the file is being
reloaded
 Rapid generation of large amounts of Transaction Management Facility (TMF)
audit data
The extreme cases of good and bad file organization are easy to identify:
 If the average chain contains 100 percent of the blocks, the file’s organization is
ideal.
 If the average chain contains 1 per cent of the blocks, the file is maximally
disorganized.
Between these extremes exists a large gray area. If a file’s average chain contains
20 percent of the blocks and the application performance has degraded moderately in
the last month, it is difficult to state that the file definitely should be reloaded. You
should use Reload Analyzer’s output to help you decide whether the expected
performance improvement (probably moderate in this case) is worth the cost in TMF
audit generation and performance degradation during the reload.