PQ65762: WEBSPHERE GETS A NEW DATASPACE IN BBOSMS EVERYTIME J2EE SERVER IS STARTED AND STOPPING SERVER DOES NOT RELEASE DATASPACE. | |||||||||||||||||||||||||||||||||||||||||
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![]() APAR status Closed as program error. Error description WebSphere adds a new dataspace to its systems management server every time a J2EE server is started which has SMF recording enabled. The dataspace is supposed to be deleted once the J2EE server is stopped, but this only occurs if SMF recording is also enabled in the systems management server. When SMF recording is disabled in systems management then the data space is not deallocated. Repeated J2EE server stops and starts under these circumstances ends up leaving many unused data spaces assigned to the systems management server control region address space (BBOSMS). You can use the D A,BBOSMS operator command to display the systems management server control region and associated dataspaces. Here is an example output that shows several data spaces that have not been cleaned up. NETAR 13:53:36 D A,BBOSMS CPUR 13:53:36 IEE115I 13.53.36 2002.235 ACTIVITY 489 JOBS M/S TS USERS SYSAS INITS ACTIVE/MAX VTAM OAS 00045 00119 00243 00036 00157 00239/00970 00086 BBOSMS SYSMGT01 BBOSMS NSW SO A=0529 PER=NO SMC=000 PGN=N/A DMN=N/A AFF=NONE CT=287.809S ET=00291.11 WUID=JOB01064 USERID=CBSYMCR1 WKL=SYSTEM SCL=SYSSTC P=1 RGP=N/A SRVR=NO QSC=NO ADDR SPACE ASTE=7B2B1A40 DSPNAME=00099BBO ASTE=648C5A8 DSPNAME=00096BBO ASTE=65B99F0 DSPNAME=00095BBO ASTE=648C588 DSPNAME=00089BBO ASTE=65B99E0 DSPNAME=00094BBO ASTE=24C7448 DSPNAME=00093BBO ASTE=648C520 DSPNAME=00092BBO ASTE=648C530 DSPNAME=00097BBO ASTE=28C5390 DSPNAME=00070BBO ASTE=65B9978 This amounts to a leak of a data space and some amount of virtual storage each time the J2EE server is stopped. The data space is created with DSPSERV CREATE BLOCKS(524287) but it is not clear exactly how much of that is in use. It depends on the J2EE server's SMF recording activity.Local fix Problem summary **************************************************************** * USERS AFFECTED: All users of WebSphere Application Server * * V4.0.1 for z/OS and OS/390 * **************************************************************** * PROBLEM DESCRIPTION: SMF does not delete dataspaces which * * are no longer used. * **************************************************************** * RECOMMENDATION: * **************************************************************** SMF creates dataspaces to record activity and interval data. Each time a server is restarted if SMF recording is enabled, a new dataspace is created. The old dataspace is not deleted. If SMF recording is toggled off completely, the unused dataspace is not deleted.Problem conclusion The code has been changed so that the SMF processing thread will run to delete dataspaces that are no longer used. APAR PQ65762 is associated with SERVICE LEVEL W401500 of WebSphere Application Server V4.0.1 for z/OS and OS/390.Temporary fix Comments
APAR is sysrouted FROM one or more of the following: APAR is sysrouted TO one or more of the following: Modules/Macros
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Document Information |
Product categories: Software > Application Servers >
Distributed Application & Web Servers > WebSphere Application
Server for z/OS
Operating system(s):
Software version: 401
Software edition:
Reference #: PQ65762
IBM Group: Software Group
Modified date: Mar 5, 2003
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