Hi All,
Our client is on rev70 and memory consumption for the system is high due to high delta store memory, for eg: DELTA_GB for SAP schema is 100GB whilst MAIN_GB is just 10GB for column store.
Besides that, M_CS_TABLE show high memory size in delta as compare to memory size in main. Looking at Merge Statistic info, delta merge did run. I can see "START_TIME" is recent and up to date, with type "RECLAIM" and MEMORY_MERGE = "TRUE". However, did a check on runtime for each particular table, Memory consumption in delta storage is still high and not reduce at all. Merge method is system default.
Check the "merge" process in performance-> load, system resource was not utilized for merge process. Analyze index trace, couldn't find any error log.
mergedog parameter is set correctly. Did a comparison with other system.
Therefore, instead of delta merge each and every tables, is there anyway to ensure mergedog is running correctly? I assume perform a HDB restart will restart mergedog as well, correct me if i'm wrong.
All kind input is very much appreciated.
Thanks,
Nicholas Chang