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2751736 - Spinlock contention on default data cache and high logical reads on sysattributes - SAP ASE


Elevated engine utilization and spinlock contention on the default data cache can be seen in a specific case where the following are true

  • Very high connection rate, 1000+ per second
  • Usage of set_appcontext and get_appcontext

While set_appcontext and get_appcontext are not required for this issue, they add additional logical IO on the master..sysattributes table which is the object contributing to the spinlock contention.



  • SAP Adaptive Server Enterprise (ASE) 16.0
  • SAP Adaptive Server Enterprise (ASE) 15.7


SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 16.0


CR818013, CR#818013, 818013 , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem

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