Steps to mitigate the rapid growth of the table: Call Chains [sys_call_chain]DescriptionCall Chains [sys_call_chain] is an internal table introduced in Paris release for internal purposes and to support future features in the roadmap. This table may grow very rapidly in scenarios such as a large number of ASYNC script jobs (>100,000) is executed on a daily basis. If this table is very large (>1 million), this may also cause the associated table cleaner rule to execute an inefficient query as well. Support may reach out to you as part of internal monitoring alerts such as "Disk Growth > 95%", "Abnormal SQL Response Time" or proactive analysis of the instance to take actions to mitigate the growth of this table and the inefficient query. Steps to Reproduce If the 2 conditions below are met, this KB will apply. 1. Navigate to /sys_call_chain_list.do. Check if this table is very large (>1 million) and continues to grow each day. 2. Navigate to /sys_db_object_list.do?sysparm_query=name%3Dsys_call_chain and verify that there is no index on sys_created_onWorkaroundPlease refer to the following for the options to mitigate the growth of this table. A. If the number of records is less than 1 million: - create an index on sys_created_on for the table: sys_call_chain. - modify the "Age in Seconds" for related table cleaner rule (/sys_auto_flush_list.do?sysparm_query=tablename%3Dsys_call_chain) from 604800 (7 days) to 86400 (1 day) - as the table cleaner rule has been modified in the step above, this is considered as a customization. In order to receive the changes to this rule (if any) in the next upgrade, navigate to sys_update_xml_list.do and filter for the table cleaner rule (/sys_update_xml_list.do?sysparm_query=name%3Dsys_auto_flush_c9dbd6f953030010b471ddeeff7b12c6) and check the "Replace on upgrade" field Note: The development team is reviewing the modifications above for inclusion in future Paris Patch releases. The above can be performed by the admins of the instance. Please consider starting the index creation outside of business hours. B. If the number of records is more than 1 million: - please provide consent for Support to delete all records from this table. The delete of all records from this table does not impact any functionality of the platform as it is used for internal purposes. There will not be any downtime or performance impact from the delete of the records. Please note that Support may need to stop the Table Cleaner job during the process of the cleanup. - Support will also perform the modifications in A as part of the change as well. If the above are not sufficient to mitigate the growth in the sys_call_chain table, Support will propose other mitigation steps.Related Problem: PRB1453533