The IBM Large System Performance Reference (LSPR) ratios represent IBM's assessment of relative processor capacity in an unconstrained environment for the specific benchmark workloads and system control programs specified in the tables. Ratios are based on measurements and analysis. The amount of analysis as compared to measurement varies with each processor. The data that follows is based solely on IBM's measurements and analysis of the processors in the tables. For machines not listed in the tables, contact the corresponding vendor for performance information.

Many factors, including but not limited to the following, may result in the variances between the ratios provided herein and actual operating environments:

• Differences between the specified workload characteristics and your operating environment
• Differences between the specified system control program and your actual system control program
• I/O constraints in your environment
• Incorrect assumptions in the analysis
• Unknown hardware defects in processors used for measurement

IBM does not guarantee that your results will correspond to the ratios provided herein. This information is provided "as is", without warranty, express or implied.

For some details on how LSPR data is obtained see:
Measurements.

LSPR workloads including the latest changes/updates

• LSPR workload descriptions

• Relating Production Workloads to LSPR Workloads

z/OS V1 R8 LSPR ITR ratios

• z/OS V1R8 LSPR FAQ

• IBM processors running multiple z/OS images

• IBM processors running a single z/OS image

z/OS V1 R6 LSPR ITR ratios

• z/OS V1R6 LSPR FAQ

• IBM processors running multiple z/OS images

• IBM processors running a single z/OS image

z/OS V1 R4 LSPR ITR ratios

• IBM processors

Linux on System z SLES9 LSPR ITR ratios

• IBM processors

Linux on zSeries 2.4.7 LSPR ITR ratios

• IBM processors

z/VM V5 R2.0 ITR ratios

• z/VM V5R2 LSPR FAQ

• IBM processors

z/VM V4 R3.0 LSPR ITR ratios

• IBM processors

z/VM V4 R2.0 LSPR ITR ratios

• IBM processors

VSE/ESA 2.3.2 LSPR ITR ratios

• z/VSE LSPR FAQ

• IBM processors
• HDS processors

The following link provides a brief introduction to LSPR and the capability to download a version of the full LSPR document in PDF format. For quick access, right-click on SC28118712.pdf to save/download the Large Systems Performance Reference PDF document.

• Introduction and downloadable LSPR

The following links provide additional sources for performance information for VM/ESA and VSE/ESA.

• VM/ESA Performance Resources
• VSE/ESA Resources