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Oct 17, 2019 at 04:55 AM

Questions about Delta Merge in Hana



We have a table in HANA which was initially this big:

After a few days, we've checked it again and the 'size on disk' was reduced by 8GB:

I suspect it is because a delta merge happened in between these times:

My question is, does delta merge affect the 'size on disk' of a HANA table? Is it normal that tables lose data after a delta merge? For instance, the table above lost over 7000 entries after the merge. What causes a table to occupy 'disk size' that is significantly large than total memory consumption?


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