Difference between manual and automatic execution of Sysview for Db2 history unload process

Products

• SYSVIEW Performance Management Option for DB2 for z/OS

Issue/Introduction

What is the difference between executing the Sysview Performance Management Option for Db2 for z/OS (IDB2)
unload process manually and unloading it automatically by started task based on the percent file usage?
Do both executions save the last unload date the same way.

Resolution

The manual execution provides a means to execute either online or offline. The IDB2 data collector can be either up or down.

During an offline execution the whole file is generally unloaded and the last unloaded record in not saved.
(The batch job tells the data collector to do this, so in the offline mode when the data collector is down, the last record unloaded will not be saved.)