A fix is available
APAR status
Closed as program error.
Error description
z/VM Performance Data Pump has been changed to better recover from connectivity problems and short outages without loss of performance data. When the TCP/IP connection to the time series database is lost, reconnect is retried at reasonable intervals. In some network configurations persistent TCP/IP connection may be broken frequently. For short outages data will be buffered and sent once the service is available again, also allowing for a service restart without data loss. During longer outages, the oldest data is discarded once a set threshold is reached. Additional diagnostic function has been added to help z/VM Development diagnose issues in client configurations. The MDXSETUP logic was improved to address various situations observed in client configurations. Minor metrics changes have been made, among others to classify virtual machines better by operating system type. The z/VM Overview sample dashboard will distinguish between users running CMS and z/CMS. A duplicate field in the systcup measurement to avoid problems when feeding the data into Splunk. PERFKIT has been changed to correct a programming error that in some situations caused the following message: FCXBAS199A Divide exception at FCXPRC+35FC
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of Perfkit and Datapump. * **************************************************************** * PROBLEM DESCRIPTION: * **************************************************************** * RECOMMENDATION: APPLY PTF * **************************************************************** When z/VM Performance Datapump experiences connectivity and outagesperformance data may be lost. In addition there may be some issuesduring installation in certain configurations. Also, Performance Toolkit may experience a divide exception error.
Problem conclusion
When z/VM Performance Datapump experiences connectivity and outages performance data may be lost. In addition there may be some issues during installation in certain configurations. Also, Performance Toolkit may experience a divide exception error. z/VM Performance Data Pump has been changed to better recover from connectivity problems and short outages without loss of performan When the TCP/IP connection to the time series database is lost, reconnect is retried at reasonable intervals. In some network config The MDXSETUP logic was improved to address various situations observed in client configurations. Minor metrics changes have been made, among others to classify virtual machines better by operating system type. The z/VM Overview s PERFKIT has been changed to correct a programming error that in some situations caused the following message: FCXBAS199A Divide exception at FCXPRC+35FC
Temporary fix
Comments
APAR Information
APAR number
VM66881
Reported component name
PERF TOOLKIT
Reported component ID
568411218
Reported release
740
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
YesSpecatt / New Function / Xsystem
Submitted date
2025-09-04
Closed date
2026-01-07
Last modified date
2026-01-15
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UM90581
Modules/Macros
FCXPRC MDXDICT MDXSETUP MDXUTILX 7VMPTK40
Fix information
Fixed component name
PERF TOOLKIT
Fixed component ID
568411218
Applicable component levels
R740 PSY UM90581
UP26/01/15 I 1000
Fix is available
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Document Information
Modified date:
16 January 2026