Hi,
you can see the at info cube mangae screen.
Updating the marker (Marker Update) is a special feature available only for noncumulative InfoCubes.
This is done to improve the performance of the query read, especially when reading the current stock.
It is used to reduce the time of fetching the non-cumulative key figures while reporting.
Compress the request with stock marker => uncheck the marker update option.
Compress the loads without the stock marker => check the marker update option.
please find the wiki about marker update.
Thanks,
Phani.