STRANGE DISPLAY OF READ EFF IN BUFFER POOL LIST DISPLAY PANEL

Article Id: 49398

Status: Published

Updated On: 14-02-2018 07:59

Legacy Id: TEC575263

Products:

CA RC/Migrator , CA Endevor SCM Interface , DB2 Administration , CA RC Compare for DB2 for z/OS , CA RC Extract for DB2 for z/OS , CA RC/Query , CA RC Secure for DB2 for z/OS , CA RC Update for DB2 for z/OS , CA Bind Analyzer for DB2 for z/OS , CA SQL-Ease for DB2 for z/OS , CA Sysview Performance Management Option for DB2 for z/OS , CA Database Detector for DB2 for z/OS , CA Plan Analyzer for DB2 for z/OS , CA Subsystem Analyzer for DB2 for z/OS , CA Database Analyzer for DB2 for z/OS , CA Fast Unload for DB2 for z/OS , CA Fast Check for DB2 for z/OS , CA Fast Index for DB2 for z/OS , CA Fast Load for DB2 for z/OS , CA Rapid Reorg for DB2 for z/OS

Issue/Introduction:

Question:

The Buffer Pool List displays the value of Read Eff as *******. What does this mean?

Answer:

READ EFF stands for Read Effectiveness and is the ratio of Getpage requests to Synchronous I/O operations. When Synchronous I/O value is 0 (zero) and getpage value is NON ZERO, since you can't divide by zero, that's when the value of Read Eff is displayed as ********.

Environment:

Release:
Component: CIDB