ServiceNow truncating very large tables which are no longer used - and example
Issue:
Request regarding the deletion of records on the following tables - azure_billing_daily - azure_billing_monthly
Business Impact:
Tables have not been used since 2018
Solution Proposed:
This is a common question regarding data management. We have an article which provides several methods to handle the data and possible deletions:
The article covers the following four topics: UI actions Clone exclude rules Table cleanup policies JavaScript We recommend testing in subproduction environment(s) prior to any implementation in production. ServiceNow does not intervene in data removal requests unless the presence of those records are causing a business critical operation to be unusable.
Next Steps:
Would you be able to review the cleanup methods mentioned and let us know if you have any additional questions. We would be happy to follow up.
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example script - tables no longer used:
var grBusRule = new GlideRecord('sys_script');grBusRule.addActiveQuery();grBusRule.addQuery('name', 'custom-Azure Billing Query Based On Role');grBusRule.query();if (grBusRule.next()) { gs.log('PLEASE DISABLE BUSINESS RULE "custom-Azure Billing Query Based On Roles" BEFORE PROCEEDING', 'fixScr_16482'); } else { var stable1 = "azure_billing_daily"; //--4M +records var stable2 = "cloud_mgmt_billing_daily"; //--2.5M +records var stable3 = "cloud_mgmt_tag_history_map"; //--874K +records var stable4 = "cloud_mgmt_rsrc_tag_history"; //--226K+ records var stable5 = "azure_billing_monthly"; //--156K +records truncateAzureTable(stable1); //--timing: took approx 40 mins for the largest table /*truncateAzureTable(stable2); truncateAzureTable(stable3); truncateAzureTable(stable4); truncateAzureTable(stable5);*/}function truncateAzureTable(tableName) { var bTruncate = false; bTruncate = true; var Tgr = new GlideRecord(tableName); Tgr.query(); if (bTruncate) { gs.log(tableName + ':: table truncate START', 'fixScr_16482'); /*skip business rules*/ Tgr.autoSysFields(false); //--leave last updated intact Tgr.setWorkflow(false); //--skip business rules and notifications Tgr.deleteMultiple(); gs.log(tableName + ':: table truncate END', 'fixScr_16482'); } else { gs.print(tableName + '--TABLE ROW COUNT: ' + Tgr.getRowCount()); }}
http://www.cloudminus89.com/2022/07/servicenow-truncating-very-large-tables.html