Without DATA CAPTURE CHANGES enabled for the SYSIBM catalog tables ,
CA Log Analyzer will need to process archive logs forward since the most
recent image copy of the DB2 catalog tablespaces.
If image copies are not taken regularly of your Catalog Tablespaces
we need to go back some time.
The recommendation would be to enable DATA CAPTURE CHANGES for the SYSIBM tables
so the image copy and additional archive logs are not required.
So this can be prevented by either taking more frequent copies of the catalog or
setting DATA CAPTURE CHANGES.
On lightly used system, we would recommend DCC, as the logging overhead would be negligible.
There is a TEC doc explains this TEC1971745