A fix is available
APAR status
Closed as program error.
Error description
Per design certain application clients open and close a large number of StorageAgent/Server sessions at very high speed. This behaviour is typical during "crosscheck" or "delete obsolete" by Oracle RMAN via TDP Oracle, where a large number of objects may be queried from the TSM database, one session for each object query. . An inefficiency has been identified in session queue processing that can lead to different degrees of slowdown: From an increased duration of crosscheck/delete obsolete up to the following message in actlog: . ANR0429W Session ... for node ... refused - maximum server sessions ... exceeded. . Any other client may experience the same problem if it opens and closes large numbers of sessions at high speed. . TSM Versions Affected: TSM Server and StorageAgent 5.5 on all platforms . Initial Impact: Medium
Local fix
Switching LanFree clients to "enablelanfree no" during crosscheck/delete obsolete may increase processing speed through bypassing the session bottleneck on the StorageAgent. . Increasing MAXSESSIONS does not necessarily help. . Experience on the reported z/OS system suggests that tracing the TSM server with "trace enable session addmsg admcmd" and "trace begin filespec MAXSIZE=300" changes the timing behaviour, so ANR0429W can be prevented at the expenses of a reduced general TSM Server performance.
Problem summary
**************************************************************** * USERS AFFECTED: All Tivoli Storage Manager server users on * * all platforms. * **************************************************************** * PROBLEM DESCRIPTION: See error description. * **************************************************************** * RECOMMENDATION: Apply fixing level when available. This * * problem is currently projected to be fixed * * in levels 5.4.6, 5.5.3, and 6.1.3. Note * * that this is subject to change at the * * discretion of IBM. * **************************************************************** *
Problem conclusion
This problem was fixed.
Temporary fix
Comments
APAR Information
APAR number
PK84259
Reported component name
TSM FOR OS/390
Reported component ID
5698ISMVS
Reported release
550
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2009-04-07
Closed date
2009-06-29
Last modified date
2009-10-22
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
TSM FOR OS/390
Fixed component ID
5698ISMVS
Applicable component levels
R550 PSY
UP
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGSG7","label":"Tivoli Storage Manager"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"550","Line of Business":{"code":"LOB26","label":"Storage"}}]
Document Information
Modified date:
24 October 2021