XI Adapter Engine is stuck

November 7, 2009 at 8:23 pm

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Symptom
Your J2EE Engine is stuck. XI/PI Message flow through the Adapter Framework has stopped. On 6.40 and 7.0 systems logon to the Visual Administrator isn’t possible any longer, in 7.1 systems SAP NetWeaver Administrator hangs. System startup failes, hangs or takes very long.
Other terms
Application Thread Manager, Max Thread Count, Messaging System, [...]

Bad performance/ system lockup due to enqueue waits

July 2, 2009 at 12:22 pm

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Symptom
high enqueue waits after a reorganization/ change of extent size
Other terms
v$lock
ST-lock
enqueue
lock
insert, update , delete
DML
space management
coalesce free space
alter tablespace coalesce
reorganization
next extent size
Reason and Prerequisites
Performance is at a standstill, all workprocesses are occupied, oracle sessions show enqueue waits
there can be different reasons why an enqeue can cause severe performance impacts on the system. In order to [...]

Configuring Maximum Message Size Limits for OOM Error

June 30, 2009 at 9:12 am

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Symptom
You notice that the J2EE Engine restarts frequently, due to an Out Of Memory Error(OOM) (i.e., “java.lang.OutOfMemoryError” ). Traces and thread dumps will exhibit, the following error message: “java.lang.OutOfMemoryError. The JVM(Java Virtual Machine) will exit with an exit code of 666″
Other terms
JDBC, JDBC Adapter, OutOfMemoryError, OOM , Message Size Limit, Limit Number of [...]