Flow Chart Analysis
z/VM Problem Determination Flow Chart Analysis
(0) Read this first for pertinent information about Velocity's performance methodology and guidelines -
(1) What is the system configuration - Is the system configured properly and as expected?
(2) What is the current view of the system?
- System load analysis - General system performance information
- Wait state constraint analysis - What resources are unavailable to the users/servers
- Be sure to check ESAOPER for errors or other pertinent information around the time of an issue
- If using the zTUNE product, there are many helpful performance suggestions in the ESATUNE report that may be all that is needed to solve a problem quickly!
(3) What are the system and subsystems showing?
- CPU - General Information
- LPAR - General Information
- LPAR weights/overhead analysis - Is the LPAR performing as expected
- LPAR pool analysis - If in use, how are the LPAR pools doing
- Storage - General Information
- DASD - General Information
- DASD configuration analysis - Is the DASD subsystem configured correctly
- DASD utilization analysis - How is the DASD performing
- DASD cache analysis - How is the DASD cache performing
- DASD channel analysis - How are the DASD channels performing
- Network - General Information
(4) What are the users showing?
- User - General Information
- Wait state constraint analysis - What resources are unavailable to the users/servers
- CPU - General Information
- User resource utilization analysis - Find problem users/servers
- Linux configuration analysis - How are the Linux servers configured
- Linux utilization analysis - How are the Linux servers performing
- Validate virtual CPUs - Does a Linux server have too many vCPUs
- Storage - General Information
- DASD - General Information
- Network - General Information
