SAP Knowledge Base Article - Preview

1943904 - High procedure cache and CPU usage after Java clients migrates to jConnect 7 - SAP ASE

Symptom

  • After migrating Java client applications to use jConnect 7.0 from jConnect 6.0 or earlier, ASE may experience high procedure cache usage and high CPU usage which may lead to server unresponsive.
     
  •  This would happen together with the following conditions :
    • Java application uses a lot of preparedStatement objects
    • Java application has long running connections to ASE (like application server using jConnect as cached connections to ASE)
    • Java application does not close preparedStatement objects which are created earlier


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Environment

  • SAP Adaptive Server Enterprise (ASE) 15.7
  • SAP Adaptive Server Enterprise (ASE) 16.0
  • SAP Sybase Software Developer Kit (SDK) 15.7
  • jConnect for JDBC 7.0

Product

SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0 ; Sybase SDK 15.7

Keywords

DYNAMIC_PREPARE, monCacheProcedure, monCachedProcedure, monCacheProcedures, spinlock, contention, upgrade, migration, LWP, "light weight procedure",  compilation , KBA , BC-SYB-SDK , SDK , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem

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