SAP HANA Forum
May I know that What are reasons why auto merges aren't executed as expected?
Kindly share your views,
Thanks in advance.
If tables aren't automatically merged although the delta storage is filled significantly, you can check the following potential reasons.
Reason: Inadequate auto merge decision function
Details: Make sure that the auto_merge_decision_func parameter is default or set to a reasonable value. Check if the conditions of the tables in question fulfill the auto_merge_decision_func.
Reason: Auto merges deactivated on table level
Details: Check via SQL: "HANA_Tables_ColumnStore_AutoMergeDisabled" if auto merges are disabled on table level and enable them if required.
Reason: Mergedog deactivated
Details: Make sure that
indexserver.ini -> [mergedog] -> activeisn't explicitly switched off ('false'), because this would disable the mergedog and no more auto merges are performed.
Reason:Tables assigned to wrong service
Details: The mergedog only considers tables related to the services with own persistent tables like indexserver and statisticsserver. If tables are assigned to other services (e.g scriptserver), no auto merge will happen.
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