PI84190: LOAD BALANCER MANAGER CONSUMES UNNECESSARY MEMORY RETAINING WEIGHT HISTORY

Fixes are available

APAR status

Closed as program error.

Error description

The function which used this history no longer exists and could
be a potential cause of memory growth.

Local fix

Edit dsserver and change the last line to add the custom
property -DLB_DONT_KEEP_SERVER_HISTORY=true. LB will need to be
restarted (executor stopped, dsserver stopped) for this to take
effect.

Example:
export LIBPATH=$LB_BASE/servers/lib
  /opt/IBM/WebSphere/Edge/ULB/java/jre/bin/java -cp
$LB_CLASSPATH
$LB_INSTALL_PATH $LB_CLIENT_KEYS $LB_SERVER_KEYS $LB_BINDIR2
-DLB_DONT_KEEP_SERVER_HISTORY=true
-Djava.rmi.server.hostname=127.0.0.1
-Djava.protocol.handler.pkgs=com.ibm.net.ssl.internal.www.protoc
ol
com.ibm.internet.nd.server.SRV_KNDConfigServer $LB_RMIPORT
$LB_LOGDIR
$LB_SAVEDIR $LB_BINDIR $LB_CONFIGFILE $LB_RMISERVERPORT &

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere APplication Server Edge       *
*                  Components Load Balancer Manager function   *
****************************************************************
* PROBLEM DESCRIPTION: The load balancer manager function      *
*                      may consume unnecessary memory.         *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The manager function stores history of the server weights but
never utilizes this data. When using a large configuration,
this extra memory usage may impact performance.

Problem conclusion

Disabled retaining the weight history. It can be enabled by
adding the custom property -DLB_KEEP_SERVER_HISTORY=true in
the dsserver(cbrserver or ssserver) script.

Fix level: 8.5.5.13 and 9.0.0.5
Older levels can disable this memory usage by setting the
custom property -DLB_DONT_KEEP_SERVER_HISTORY=true in dsserver
(ssserver or cbrserver).

The server (dsserver, ssserver, cbrserver) must be restarted
for the java property to take effect.

Temporary fix

Comments

APAR Information

APAR number
PI84190
Reported component name
WS EDGE LB IPV4
Reported component ID
5724H8812
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-07-07
Closed date
2017-07-11
Last modified date
2017-07-11

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
WS EDGE LB IPV4
Fixed component ID
5724H8812

Applicable component levels

R850 PSY
UP
R900 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":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022

Tips

PI84190: LOAD BALANCER MANAGER CONSUMES UNNECESSARY MEMORY RETAINING WEIGHT HISTORY

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

R850 PSY

R900 PSY

Document Information

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