2434457 - ASE hangs due to large-scale blocking in PLC queue on a single engine server - SAP ASE | SAP Knowledge Base Article

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2434457 - ASE hangs due to large-scale blocking in PLC queue on a single engine server - SAP ASE

Symptom

  • ASE server has a single ASE engine thread configured.
  • During periods of highly concurrent DML activity you find large-scale blocking on the ASE
  • The blocked spids are executing COMMIT TRANSACTION
  • The blocking spid's stack references the function, plcblock__flush()

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Environment

  • SAP Adaptive Server Enterprise (ASE) 15.7 for Business Suite
  • SAP Adaptive Server Enterprise (ASE) 16.0 for Business Suite
  • SAP NetWeaver (NW) - All versions 
  • SAP Adaptive Server Enterprise (ASE) 15.7
  • SAP Adaptive Server Enterprise (ASE) 16.0

Product

SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0 ; SAP NetWeaver all versions

Keywords

ULC blocking, BUO, LOCK hanging, CR805798, CR#805798, 805798, single-engine, single-thread, 'user log cache queue size' , KBA , BC-DB-SYB , SAP Business Suite on Sybase ASE Database Platform , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem

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