APAR status
Closed as program error.
Error description
Storage Insights becomes unstable when monitoring large numbers of storage systems. In an observed case, monitoring 100 storage devices, 44 of which are from the SVC/Storwize family, the heap grows to over 1.5 gigabytes and causes the device server component to become unstable and for services running within it to stop. The heapdumps generated when OOM errors occur show as leak suspects : - arrays of PdPerfStatsData objects which accumulated the performance metrics for subsystems entities: volumes, ports, nodes, host, etc. and - ArrayList of MapperResult objects of which parents are NAPISVCEventMiniprobePostProcessor objects. The NAPISVCEventMiniprobePostProcessor keeps the results of intermediary processing in a list of MapperResult and this becomes very large. RECREATE STEPS: Observe occasional offline services resulting in failed probe/performance monitor jobs and a failure to load the web GUI. Problem as described by customer: Storage Insights instability Initial customer impact (low/med/high): high
Local fix
Storage Insights support/operations can increase device server JVM size to 3gb to provide some relief
Problem summary
**************************************************************** * USERS AFFECTED: * * IBM Spectrum Control & Storage Insights users monitoring * * large number of storage systems from SVC family. * **************************************************************** * PROBLEM DESCRIPTION: * * Spectrum Control or Storage Insights may become unstable * * when monitoring large numbers of storage systems. In an * * observed case, monitoring 100 storage devices, 44 of which * * are from the SVC/Storwize family, the heap grows to over * * 1.5 gigabytes and causes the device server component to * * become unstable and for services running within it to stop. * **************************************************************** * RECOMMENDATION: * **************************************************************** During SVC Events processing keep in the heap only relevant information for final post processing.
Problem conclusion
The fix for this APAR is targeted for the following release: IBM Spectrum Control 5.3.6 [ 5.3.6-IBM-SC ] IBM Storage Insights 1Q20 [ 5.3.6-IBM-SC ] ( release target February 2020 ) http://www.ibm.com/support/docview.wss?&uid=swg21320822 The target dates for future releases do not represent a formal commitment by IBM. The dates are subject to change without notice.
Temporary fix
Comments
APAR Information
APAR number
IT31179
Reported component name
STORAGE INSIGHT
Reported component ID
5608TPCSI
Reported release
535
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2019-12-05
Closed date
2020-01-17
Last modified date
2020-01-17
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
STORAGE INSIGHT
Fixed component ID
5608TPCSI
Applicable component levels
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSQRB8","label":"IBM Storage Insights"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"535","Edition":"","Line of Business":{"code":"LOB26","label":"Storage"}}]
Document Information
Modified date:
08 February 2022