Performance Considerations

For Speed Boost alone, the increase in processor speed is visible only to the LPAR being boosted, so there’s no direct impact to other images on the CPC. However, because the boosted image will be running more work than is usually possible during the boost period, relative to other images on the CPC, it is possible that the boosted image will impact the data caches more than it would during non-boosted periods, leading to performance decreases on non-boosted images it is sharing data caches with.

However, if you are taking advantage of zIIP Boost, either by itself or in conjunction with Speed Boost, you may need to think about the impact zIIP Boost will have on other LPARs in the CPC.