Unload Sysview for Db2 history manually does not work DBG73109I remember position

Products

• SYSVIEW Performance Management Option for DB2 for z/OS

Issue/Introduction

The Sysview Performance Management Option for Db2 for z/OS (IDB2) unload job was executed for the first time with these options:

REMEMBR=YES
UNLOAD=ALL

It produces the following message:
DBG73109I 12:35:36 DATA COLLECTOR POSTED TO REMEMBER POSITION 

It was executed again with these options: REMEMBR=YES, UNLOAD=NEW, and this message was produced:
DBG73109I 12:52:08 DATA COLLECTOR POSTED TO REMEMBER POSITION 

The generated reports for the two runs were identical with the same data.  
Why the same reports being produced?

Resolution

Executing the IDB2 unload process manually caused the problem. Executing the unload process automatically using the offload percent parameter resolved the problem.