As currently implemented, satb-mode dumps the entire collection set whenever gc Info logging is enabled. In generational mode, we only dump the entire collection set if gc Debug logging is enabled.

We should change satb-mode so that its behavior matches generational-mode.

There are two undesirable consequences of the current behavior for satb-mode:

1. The log files become so large that a long execution will wrap around and overwrite initial log files.
2. The time required to format and output all of this information for every collection set can impact throughput of the monitored application.