Why LFA causes CPU usage high? February 26, 2017February 26, 2017 IBM Customer Community Why LFA causes CPU usage high? Related:Questions on controlling alarms from PIHigh CPU usage on Impact machine?GWLeibfried replied to the Instantaneous CPU usage of processes topic thread in the Performance Tools Forum forum.nagger replied to the Instantaneous CPU usage of processes topic thread in the Performance Tools Forum forum.jsayles uploaded the file Reducing COBOL CPU Usage – Roland Koo.mp4.