IXGDELET: Deleting log blocks from a log stream

Using the IXGDELET service, you can mark some or all of the log blocks in the log stream for deletion. The IXGDELET service can be invoked from an unauthorized (non-supervisor state, problem program key mode) with the exception of when the MODE=SYNCEXIT option is used as described in topic Coding a system logger complete exit for IXGBRWSE, IXGWRITE, and IXGDELET. Additionally, when a log stream resource manager is active, it runs authorized (supervisor state, system PKM) and can affect the delete requests for the log stream.