1. Deactivate the wasp probe on the UMP system.
2. To increase the size of the portal.log, edit the file portal-log4j-ext.xml located at:
<Nimsoft>/probes/service/wasp/webapps/ROOT/WEB-INF/classes/META-INF/portal-log4j-ext.xml (look for MaxFileSize).
<param name="MaxFileSize" value="1MB" />
You could increase it to 3MB.
<param name="MaxFileSize" value="3MB" />
3. Activate wasp
Click on the hosts/devices/nodes/areas within UMP/USM to recreate any slow performance/timing issue(s), then check the portal log output once again.