5486wrkperf.fm Draft Document for Review October 18, 200446 IBM Eserver i5 and iSeries System Handbookmodel. Refer to the iSeries Performance Capabilities Reference, SC41-0607, forguidelines about what performance gains you may expect through its use.In some exceptional cases, some applications are better served by disablingsimultaneous multithreading.iSeries for Domino performance terminologyiSeries for Domino models are specially priced and configured for Dominoworkloads. iSeries for Domino separates mail, instant messaging, andcollaborative applications while automatically balancing and adjustingperformance. With iSeries for Domino servers, you can run non-Dominoworkloads without restriction, even when the Domino server is not active.The iSeries for Domino servers do not have processing guidelines fornon-Domino workloads. Performance is not measured using the CPWmeasurement, but a Mail and Calendar User (MCU) measurement.Mail and Calendar UsersMail and Calendar Users (MCU) is a relative performance measurement derivedby performing mail and calendar functions using Domino and Notes clients. TheMCU workload is significantly more complex than the Simple Mail Users (SMU)measured workload.The MCU workload represents concurrent users on a Notes client who arereading, updating, or deleting documents in an e-mail database. It alsorepresents users who are performing lookups in the Domino Directory, andscheduling calendar appointments and invitations. Reported values reflect 70%processor utilization to allow for growth and peak loads in excess of customerworkload estimates.See “Summary of today’s iSeries” on page 81 for a listing of the MCU rating foreach iSeries for Domino server.Capacity on demandIBM Eserver i5 and iSeries capacity on demand (permanent or temporary)offers the ability to nondisruptively activate one or more additional centralNote: This is unlike the Dedicated Server for Domino servers (now withdrawnfrom marketing), which have restrictions on non-Domino workloads.
