Column Unloads with no entries in M_CS_UNLOADS table

[former_member231758]

Hello everybody, this will be my first official post on SCN.

I have a question regarding column unload behavior. We have seen column unloads on one of our HANA servers (based on the column unloads trace file for this server), but they don't appear to be paired with typical column unload behavior. There doesn't appear to be any high memory demand on the system at the time of the unloads (ie, nothing near 95% of total available memory), nor are there any entries at all in the M_CS_UNLOADS table. In my research thus far, I can't find a situation in which a column would be unloaded other than in a high-memory utilization scenario, other than if someone did it manually.

For information purposes, this box is running version 85.04.

Anyone have any advice?

Regards,

Brandon Cuilty

[Former Member · Accepted solution]

See SAP Note 2100010 ("SAP HANA: Popular Misconceptions") -> "The unload trace files contain only information about column unloads".

[former_member231758 · Accepted solution]

Thank you for your help Martin!