Hello Martin,
columnstore tables can have an attribute UNLOAD PRIORITY.
This can be checked upon in system view TABLES.
It's a integer value between 0 and 9. 0 means the table won't be unloaded, 9 means if any column/table need to be unloaded at all, this one will be unloaded as early as possible.
In general the parameter is just a weighting factor that puts the tables up or down in the queue of unload candidates.
Concerning the other memory management questions please check http://www.saphana.com/docs/DOC-2299 and the current SPS 6 documentation available on http://help.sap.com/hana_appliance.
Concerning the question on M_SERVICE_COMPONENT_MEM take a wild guess...
select * from m_service_component_memory
| HOST | PORT | COMPONENT | USED_MEMORY_SIZE |
| ld9506 | 30.003 | Column Store Tables | 105.102.530.445 |
| ld9506 | 30.003 | Other Engine Components (misc.) | 37.960.227.431 |
| ld9506 | 30.003 | Row store tables + Indexes | 22.458.706.522 |
| ld9506 | 30.003 | Persistence | 1.517.751.936 |
| ld9506 | 30.003 | Database Kernel Statistics and Merge Statistics | 1.401.040.576 |
| ld9506 | 30.003 | Auxiliary Row Store Components | 1.364.478.483 |
| ld9506 | 30.003 | Memory Management Information | 1.245.708.288 |
| ld9506 | 30.003 | Prepared Statement Cache | 612.071.568 |
| ld9506 | 30.003 | Kernel Datastructures (Stack-Allocated) | 608.739.328 |
| ld9506 | 30.003 | Transaction Management | 200.988.992 |
| ld9506 | 30.003 | Column Store Intermediate Results and Shared Datastructures | 751.304 |
| ld9506 | 30.004 | Other Engine Components (misc.) | 449.819.603 |
| ld9506 | 30.004 | Auxiliary Row Store Components | 113.882.464 |
| ld9506 | 30.004 | Kernel Datastructures (Stack-Allocated) | 92.626.944 |
| ld9506 | 30.004 | Memory Management Information | 62.914.560 |
| ld9506 | 30.004 | Database Kernel Statistics and Merge Statistics | 58.092.528 |
| ld9506 | 30.004 | Persistence | 48.566.296 |
| ld9506 | 30.004 | Column Store Tables | 19.990.496 |
| ld9506 | 30.004 | Prepared Statement Cache | 13.869.000 |
| ld9506 | 30.004 | Row store tables + Indexes | 6.912.064 |
| ld9506 | 30.004 | Transaction Management | 1.831.976 |
| ld9506 | 30.004 | Column Store Intermediate Results and Shared Datastructures | 1.264 |
| ld9506 | 30.005 | Other Engine Components (misc.) | 1.135.776.855 |
| ld9506 | 30.005 | Column Store Tables | 987.949.703 |
| ld9506 | 30.005 | Kernel Datastructures (Stack-Allocated) | 278.474.752 |
| ... | ... | ||
- Lars
