LO89745: TRAVELER GOES IN TO CONSTRAINED STATE WHEN LARGE NUMBER OF USERS ARE LOAD BALANCED TO SPECIFIC SERVER
Direct links to fixes
Closed as program error.
In a IBM Traveler if a lot of users are load balance to one server this cause a constrained in Traveler because all of these users are trying to update the same entry in the Traveler database. If the database ends up being a little slow at the time a lot of users are being load balanced to new server then the updates of UpdateTsGlobalHeartbeat is taking very long time. This is seen in the following IBM Traveler stats Database.Query.Histogram.UpdateTsGlobalHeartbeat.000-001 = 2081 Database.Query.Histogram.UpdateTsGlobalHeartbeat.001-002 = 38 Database.Query.Histogram.UpdateTsGlobalHeartbeat.002-005 = 70 Database.Query.Histogram.UpdateTsGlobalHeartbeat.005-010 = 55 Database.Query.Histogram.UpdateTsGlobalHeartbeat.010-030 = 182 Database.Query.Histogram.UpdateTsGlobalHeartbeat.030-060 = 400 Database.Query.Histogram.UpdateTsGlobalHeartbeat.060-120 = 562 Database.Query.Histogram.UpdateTsGlobalHeartbeat.120-Inf = 1281
The customer needs to ensure they have run maintenance on the database and there are not any performance issue on the database server to reduce the probability of this issue happening.
To improve database performance the IBM Traveler server has begun limitting the number of concurrent transactions. In this case the load ballancing of a large number of users caused a spike in transactions which then caused a constrained state with the new lower transaction limits.
The IBM Traveler server was updated to ensure the load balancing of users did not cause a transaction spike in this scenario.
This fix will be included in IBM Traveler server 126.96.36.199 and all later releases. See this technote for the latest available maintenance release: http://www.ibm.com/support/docview.wss?uid=swg24019529
Reported component name
LOTUS NOTES TRA
Reported component ID
NoSpecatt / Xsystem
Last modified date
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fixed component name
LOTUS NOTES TRA
Fixed component ID
Applicable component levels