Expert Oracle Exadata - Parent Directory

CHAPTER 11 UNDERSTANDING EXADATA PERFORMANCE METRICSNAMECLASS_NAME---------------------------------------------------------------- ---------------cell CUs processed for compressedSQLTcell CUs processed for uncompressedSQLTcell CUs sent compressedSQLTcell CUs sent head pieceSQLTcell CUs sent uncompressedSQLTcell IO uncompressed bytesSQLTcell blocks helped by commit cacheSQLTcell blocks helped by minscn optimizationSQLTcell blocks processed by cache layerDEBUGcell blocks processed by data layerDEBUGcell blocks processed by index layerDEBUGcell blocks processed by txn layerDEBUGcell commit cache queriesSQLTcell flash cache read hitsCACHEcell index scansSQLTcell num active smart IO sessionsSQLTcell num fast response sessionsSQLTcell num fast response sessions continuing to smart scan SQLTcell num smart IO sessions in rdbms block IO due to big payload SQLTcell num smart IO sessions in rdbms block IO due to no cell mem SQLTcell num smart IO sessions in rdbms block IO due to user SQLTcell num smart IO sessions using passthru mode due to cellsrv SQLTcell num smart IO sessions using passthru mode due to timezone SQLTcell num smart IO sessions using passthru mode due to user SQLTcell num smart file creation sessions using rdbms block IO mode SQLTcell physical IO bytes eligible for predicate offloadSQLTcell physical IO bytes saved by storage indexCACHEcell physical IO bytes saved during optimized RMAN file restore SQLTcell physical IO bytes saved during optimized file creation SQLTcell physical IO interconnect bytesSQLTcell physical IO interconnect bytes returned by smart scan SQLTcell scansSQLTcell simulated physical IO bytes eligible for predicate offload SQLT DEBUGcell simulated physical IO bytes returned by predicate offload SQLT DEBUGcell smart IO allocated memory bytesSQLTcell smart IO memory bytes hwmSQLTcell smart IO session cache hard missesSQLTcell smart IO session cache hitsSQLTcell smart IO session cache hwmSQLTcell smart IO session cache lookupsSQLTcell smart IO session cache soft missesSQLTcell smart IO sessions hwmSQLTcell transactions found in commit cacheSQLTchained rows processed by cellSQLTchained rows rejected by cellSQLTchained rows skipped by cellSQLTWith a similar query, we can list all the Exadata Hybrid Columnar Compression (EHCC%) statistics, butwe will not cover those in this chapter.355