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3305387 - Process waits for LOBFileIDMapping

Symptom

You are experiencing slowness issues, and see waits for LOBFileIDMapping in the WaitGraph.

The following stack might appear as well:

syscall
Synchronization::ReadWriteLock::timedWaitLockExclusiveLL
Synchronization::ReadWriteLock::lockExclusive
DataContainer::MidSizeLobContainerImpl::deleteLobPhysical
DataContainer::MidSizeLobContainerUndo::cleanupRemoveLob
DataContainer::MidSizeLobContainerUndo::cleanup
DataAccess::UndoFileImpl::cleanup
DataAccess::GarbageCollectorJob::processCleanup
DataAccess::GarbageCollectorJob::run
Execution::JobObjectImpl::run
Execution::JobWorker::runJob
Execution::JobWorker::run
Execution::Thread::staticMainImp
Execution::pthreadFunctionWrapper
start_thread
__clone


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Environment

  • SAP HANA, platform edition 1.0
  • SAP HANA, platform edition 2.0

Product

SAP HANA 1.0, platform edition ; SAP HANA, platform edition 2.0

Keywords

HANA, LOB, GC, garbage collection, waitgraph, LOBFileIDMapping, slowness , KBA , HAN-DB-PERF , SAP HANA Database Performance , Problem

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