PI32705: Large number of TickRange instances under GuaranteedTargetStream consumes more memory and may create

Fixes are available

APAR status

Closed as program error.

Error description

Large number of TickRange instances under one
GuaranteedTargetStream instance occupies a major portion of
JVM heapspace observed under heapdump. High CPU also may be
observed because of this.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  Users of the default messaging provider     *
*                  for IBM WebSphere Application Server        *
*                  versions 7.0, 8.0 and 8.5.                  *
****************************************************************
* PROBLEM DESCRIPTION: Unnecessary TickRange instances         *
*                      occupy more heapspace and may create    *
*                      High CPU.                               *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When using Publish Subscribe in Service Integration Bus in a
multi Messaging Engine scenario, Heapdump shows large number
of TickRange instances under GuaranteedTargetStream which may
lead to unnecessary consumption of memory and considerable CPU
cycles. One possiblility of having large number of TickRange
instances is when there are a lot of silence messages which
are consecutive are not getting consolidated. So it is not
necessary to have these TickRange instances which belong to
consecutive silence messages.

Problem conclusion

Source code has been modified by consolidating the silence
ticks and sending an acknowledgement for those ticks so that
all "TickRange" instances will be deleted.

The fix for this APAR is currently targeted for inclusion in
fix packs 7.0.0.39, 8.0.0.11 and 8.5.5.6.
Please refer to the Recommended Updates page for delivery
information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI32705
Reported component name
WAS SIB & SIBWS
Reported component ID
620800101
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2015-01-14
Closed date
2015-02-17
Last modified date
2015-02-17

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
WAS SIB & SIBWS
Fixed component ID
620800101

Applicable component levels

R800 PSY
UP
R850 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
27 April 2022

Tips

PI32705: Large number of TickRange instances under GuaranteedTargetStream consumes more memory and may create

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

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

Fixed component ID

Applicable component levels

R800 PSY

R850 PSY

Document Information

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