Engine log and trace performance

Describes what impact logging and tracing has on the product's performance.

If you use the default configuration, CCLog does not normally have a significant impact on performance. If you believe that it is impacting performance, check that the default values for the parameters twsHnd.logFile.className and twsloggers.className are as described in Engine log and trace customization, and have not been set to other values.

However, even if the default parameters are in use, you might find that in situations of very heavy workload, such as when you have many jobs running simultaneously on the same workstation, multiline log messages become interleaved with messages from other processes. The length of log messages has been increased to offset this risk, but if you find it becoming a problem, contact IBM® Software Support for advice on how to reset the previous settings, which avoided the interleaved messages, but had an impact on performance at busy times.