GLYPH<SM590000> Extra zIIPs, which can be added by using the temporary boost capacity records (FC 9930  and FC 6802 on z15)  Figure B-3 Example of zIIP recovery boost (z/OS LPAR) If more logical zIIPs are available and configured in the LPAR profile (whether added by way  of the temporary boost capacity record or other temporary capacity activation) while in the  boost period, images bring more logical zIIP processors online to use the extra physical zIIP  capacity.  After the boost period ends, z/OS dispatching of work on CPs versus zIIPs returns to normal. Important:  These extra logical processors should be taken offline at the end of the boost  period (either manually or by using automation), or they are taken offline automatically  when the temporary boost record expires. The start and end of the boost period is signaled by way of a console message, ENF signal  (84), and cutting an SMF record. Also, the start and end of boost period starts new SMF  interval. A system command or PROC (IEABE) is provided to allow for early opt-out of the  boost, if wanted. Figure B-3 shows an example of recovery boost using zIIP capacity boost. In this example, three LPARs are defined on the z15 model 703 with two zIIPs. Two zIIPs are  shared between LPARy and LPARz. During normal operation, only zIIP eligible work is dispatched to the zIIPs. When LPARz  enters a boost period, general-purpose work and zIIP eligible work might be dispatched to the  zIIPs. When the boost period ends, only zIIPs-eligible work is dispatched to the zIIPs. System Recovery Boost using zIIP boost example Appendix B. System Recovery Boost  495