Reviewed and maintained resource page for most common, high-impacting Performance issues on ServiceNow instances.
Performance Troubleshooting
- KB0517282: Troubleshooting case where all users experience performance issues on all applications
- KB0755182: Steps to determine the cause of a cache flush
- KB0656152: Troubleshooting instance response times | homepages
- KB0584420: Troubleshooting guide: using the transaction logs
- KB0997495: How to troubleshoot a slow transaction
- KB0517241: Troubleshooting slow performance
- KB0517274: Identifying abnormal JVM memory utilization
- KB0517277: Identifying high transaction concurrency
- KB0662260: Where to look when an instance experiences performance issues
- KB0635449: Resolving slowness / latency when populating connect chat windows (/$chat_support.do)
- KB0635134: Resolving "exhausted default semaphores" errors caused by Service Portal widgets having poorly defined record watcher (recordWatch) calls
- KB0755068: Very slow response time
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How To
- KB0517269: Gathering stats.do and threads.do page data
- KB0647698: How to obtain slow widget debug timing in Service Portal
- KB0635968: How to cancel a long running transaction | all nodes
- KB0634930: How to change the stats.do tag "DEMO Server"
- KB0745198: How to get the top 10 values from a table using the GlideAggregate function
- KB0661882: How to set dictionary attributes quickly for all fields in a table or set of tables
- KB0723049: How to detect stuck scheduled jobs that may be stuck on a non-existent node
- KB0656014: How to cancel your slow user transactions
- KB0727199: How to identify slow lookup variables in the Service Catalog
- KB0634955: How to change the homepage refresh behavior
- KB0564339: Understanding browser usage from transaction logs
- KB0977234: Text Re-index a table without impacting current search results
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Improve User Performance
- KB0683275: Internet Explorer 11 performance - no longer supported
- KB0563671: Improving homepage performance
- KB0635324: Optimize widget rendering time on responsive dashboards
- KB0635119: Modifying 'Workflow Stage' field from Graphical to Text
- KB0517272: Verifying whether you have inefficient business rules
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Best Practices
- KB0750152: Good practices to improve instance performance through row count, related lists and dashboards
- KB0546788: Best practices – general planning
- Community: Server-side Coding in ServiceNow
- KB0687724: ServiceNow load testing
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Event Queue (sysevent)
- KB0721202: Reduce un-necessary text index events from causing overhead on events processing
- KB0676909: Create a dedicated event processor
- KB0686835: Platform events processing
- KB0755187: Event queue has very high number of queued events
- KB0687779: Making the post clone regenerate text index process faster
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Data Management
- KB0724183: A script to automatically clean up sys_audit_delete and sys_audit_relation records
- KB0780216: Data retention, rotation, cleanup and instance size
- KB0694151: Use "Table Cleaner" to remove unwanted data
- KB0551417: Troubleshooting the Table Cleaner scheduled job
- KB0789808: Background script execution (delete action) taking hours to complete and appears hung
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Database
- KB0782916: How to create indexes using the Index Suggestion Engine (ISE)
- KB0722985: Utilizing the INSTANCEOF operator to improve cmdb_ci queries.
- KB0686002: Identifying and fixing slow queries in Service Portal widgets
- KB0647687: Using "Active Query Index Hints" to improve slow query execution
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Integrations
- KB0517267: Managing network connectivity issues
- KB0547347: Outbound SOAP request times out at 175 seconds when going through a MID server
- KB0521688: Troubleshooting network performance data collection
- KB0749897: How to solve "infinite email" loops
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