#A4# #LOG BUFFER# #User threads# #RECENT WRITTEN# #LOG WRITER# #LOG FLUSHER# #write_lsn# #flushed_to_disk_lsn# #FLUSH EVENTS# #LOG FLUSH NOTIFIER# #buf_ready_for_write_lsn# #DISK (LOG FILES)# #WRITE EVENTS# #LOG WRITE NOTIFIER#