Expert Oracle Exadata - Parent Directory

CHAPTER 7 RESOURCE MANAGEMENTFigure 7-5. Test summary: two databases, instance caging turned offThe source for the data reflected in this summary was collected as follows:% of 1 Core: Individual process CPU from the %CPU column from the top command.% of Total CPU: Result of % of 1 Core / 16 cores (CPU threads).User: Cpu(s): nn.nn%us from the top command.Kernel: Cpu(s): nn.nn%sy from the top command.Idle: Cpu(s): nn.nn%id from the top command.Total CPU: Sum of User, Kernel, and Idle.Total Connection CPU: Sum of % of Total CPU for each database.Total Other + Idle CPU: Total CPU – Total Connection CPU.SCRATCH %: % of Total CPU(SCRATCH) / Total Connection CPU.SNIFF %: % of Total CPU(SNIFF) / Total Connection CPU.The ‘SCRATCH %’, and ‘SNIFF %’ numbers are what we’re interested in. They represent the percentageof total CPU used by all sessions in each of these databases. As you can see from the summary, thedatabases were split at approximately 50% each.202