A new LogStream is recommended by Precisely to be processed by a new Publisher. Using the existing LogStream and Publisher used by IMS Capture requires careful consideration of potential out of sync conditions.
When CF Structures are used for the z/OS System Logstreams, the IMS Log Capture and IMS Unload components use a throttling technique to avoid offloads and keep data in the CF structure until it is Published and consumed by the downstream Engine(s). This provides better performance and more efficient use of CPU vs having the publisher retrieve data from offloaded datasets. Throttling is controlled by the specification of High and Low Offload percentages for structure utilization. It is important to size CF structures to avoid throttling if possible while at the same time to avoid offloads.
Throttling is turned on by default but can be turned off using --ptk=14. Throttling slows down the LogStream (zlog) put process used by the Capture to give publishers time to catch up and hopefully avoid offload. It's a crude control, and sometimes not very effective because It can cause capture to slow down. The Capture and Publisher don't communicate with each other to refine it. Some customers however choose to disable throttling with the PTK because they would rather have offloads occur than slow down change data capture.