Our September 2017 updates to the Applications DBA (AD) and EBS Technology Stack (TXK) tools for EBS 12.2 contained an enhancement that you might have missed. The AD/TXK Delta 10 updates include a new context variable for the adstrtal and adstpall application tier control scripts:
This new context variable allows you to set the thread count for the adstrtal and adstpall application tier service control scripts. This parameter allows you to start managed servers in batches specified by the variable. One of our largest customers was experiencing some performance-related issues that were partially-addressed by this enhancement.
The default value of this variable is 10, which is the hardcoded value that was previously used in these scripts. Depending on your requirements, you can now change the value. Overriding this value could have a positive impact on performance, for example, in a large server where there are 64 CPUs. The setting should be based on the number of processors on the system. It must always be a value greater than zero, and should not exceed twice the number of processors.
Remember, you should always upgrade your EBS 12.2 environments to the latest AD and TXK updates whenever they're released.