Fixes are available
6.1.0.1: WebSphere Application Server V6.1.0 Fix Pack 1 for HP-UX
6.1.0.1: WebSphere Application Server V6.1.0 Fix Pack 1 for AIX
6.1.0.1: WebSphere Application Server V6.1.0 Fix Pack 1 for Windows
6.1.0.1: WebSphere Application Server V6.1.0 Fix Pack 1 for Linux
6.1.0.1: WebSphere Application Server V6.1.0 Fix Pack 1 for i5/OS
PK24146; 6.0.2.3: Filter out expiration and LRU based Invalidation Events
6.1.0.1: WebSphere Application Server V6.1.0 Fix Pack 1 for Solaris
APAR status
Closed as program error.
Error description
Dynacache creates invalidation events for objects that are removed from a cache if: 1. Cache expires, 2. LRU eviction, This can cause large object allocations and possibly result in an OutofMemory condition.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: WebSphere Application Server version 6.0.2 * * users of clustered, replicated cache * * configurations who do not have * * combinations of shared and not shared cache * * entries and do not wish to send notification * * events for expirations and LRU invalidations * * * **************************************************************** * PROBLEM DESCRIPTION: Needless notifications are sent in the * * case where you have entries that do not * * combine shared/not shared. Sending of * * these notifications affects performance * **************************************************************** * RECOMMENDATION: * **************************************************************** Dynacache sends invalidation notifications to all cluster members in all situations. In some cases, these invalidation events are un-needed and can become a performance drain.
Problem conclusion
Dynacache added two custom properties to disable sending of notifications in two situations: invalidations based on LRU evication and invalidations based on timeout. These custom JVM properties are as follows: com.ibm.ws.cache.CacheConfig.filterLRUInvalidation com.ibm.ws.cache.CacheConfig.filterTimeOutInvalidation The fix for this APAR is currently targeted for inclusion in fixpack 6.0.2.13. 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
PK24146
Reported component name
WEBSPHERE BASE
Reported component ID
5630A3600
Reported release
60A
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2006-04-28
Closed date
2006-05-10
Last modified date
2006-05-10
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Modules/Macros
DYNACACH
Fix information
Fixed component name
WEBSPH APP SERV
Fixed component ID
5724J0800
Applicable component levels
R60A PSY
UP
R60H PSY
UP
R60I PSY
UP
R60P PSY
UP
R60S PSY
UP
R60W PSY
UP
R60Z PSY
UP
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.0","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
19 October 2021