3 Synergy with the IBM Z platform As with previous Db2 versions, Db2 12 for z/OS takes advantage of the latest improvements  that are available on the IBM Z platform. Db2 12 increases its synergy with z Systems  hardware and software to provide better performance, stronger resilience, and better  functions for an overall improved value.  Db2 12 also adds more z Systems Integrated Information Processor (zIIP) eligibility, and can  use zEDC cards to enable LOB compression.  This chapter includes the following topics: ' Copyright IBM Corp. 2017. All rights reserved. 83 GLYPH<SM590000> 3.1, “Large object compression ” on page 84 GLYPH<SM590000> 3.2, “ISM that uses SMC-D” on page 93 GLYPH<SM590000> 3.3, “Simultaneous multithreading” on page 100 GLYPH<SM590000> 3.4, “Performance effect of the use of 2 GB frames” on page 107 GLYPH<SM590000> 3.5, “Buffer pool simulation ” on page 110 GLYPH<SM590000> 3.6, “Large group buffer pool usage ” on page 115 GLYPH<SM590000> 3.7, “Data set open/close performance ” on page 121 GLYPH<SM590000> 3.8, “zHyperWrite ” on page 122 GLYPH<SM590000> 3.9, “Active log data set striping ” on page 123 GLYPH<SM590000> 3.10, “Easy Tier directive data placemen t support by Db2 REORG utility” on page 129