✅ 1. Check System-Wide Health First:
Use SAP HANA Cockpit or HANA Studio:
🔍 CPU Usage: Is the CPU maxed out?
💾 Memory Usage: Is HANA consuming more memory than it should?
🚦 Disk I/O: Are there slow write/read speeds?
📡 Network latency (in distributed systems)
🔧 Tool: HANA Cockpit → System Overview → Performance Metrics
✅ 2. Check Expensive SQL Statements:
Look for long-running or high-load SQL queries.
📊 Use SQL Plan Cache:
SQL QUERY As,
SELECT * FROM M_EXPENSIVE_STATEMENTS ORDER BY DURATION_MS DESC;
💡 Analyze:
Joins without indexes?
Large data scans?
Poor filters?
🔧 Tool: HANA Studio → Performance → Expensive Statements
✅ 3. Check Active Sessions & Locks:
High concurrency or blocked sessions may cause slowness.
🧍♂️ Use:
SQL Query:
SELECT * FROM M_ACTIVE_STATEMENTS;
SELECT * FROM M_BLOCKED_TRANSACTIONS;
SELECT * FROM M_LOCKS;
🔒 Look for:
Long-running transactions
Deadlocks or waiting on locks
✅ 4. Monitor Memory and Paging:
Memory overuse may lead to OS-level swapping.
Check:
SQL Query:
SELECT * FROM M_MEMORY;
SELECT * FROM M_HOST_RESOURCE_UTILIZATION;
Make sure there is:
No memory ballooning
No significant OS swap usage
🔧 Tool: HANA Cockpit → Memory Overview
✅ 5. Review Savepoints & Log Writes:
Frequent savepoints or slow log writes can delay transactions.
Use:
SQL Query:
SELECT * FROM M_SAVEPOINTS ORDER BY START_TIME DESC;
SELECT * FROM M_LOG_SEGMENTS;
Check disk latency or log segment size
✅ 6. Examine System Alerts:
HANA generates alerts automatically.
🚨 Use:
HANA Studio → Alerts
HANA Cockpit → Alerting → History
Look for:
CPU/MEM/Disk threshold breaches
Long-running jobs or failed backups
✅ 7. Check Configuration Parameters
Sometimes poor default settings or misconfigurations are to blame.
Review:
global_allocation_limit
plan_cache_size
log_mode, etc.
🔧 Use:
SQL Query:
SELECT * FROM M_INIFILE_CONTENTS WHERE LAYER_NAME = 'SYSTEM';
✅ 8. Application Layer Investigation:
If HANA is healthy, the issue could be at the app level:
API calls or OData services timing out?
Network latency between app and DB?
Poor app-side joins or loops?
🧰 Tools & Logs to Use:
📈 SAP HANA Cockpit or Studio
📄 indexserver trace logs (in /usr/sap/<SID>/HDB<instance>/trace/)
🧰 HDBAdmin, HDBSQL, SQL console
📦 SAP EarlyWatch Reports (for ongoing monitoring)
🔄 Optional: Reboot Strategy:
If root cause can't be found and system is unresponsive:
Gracefully stop/start HANA (HDB stop / HDB start)
Clear temporary files if needed
Always check Indexserver logs post reboot to trace abnormal issues.
This approach has helped me troubleshoot and resolve HANA slowndown in real time with minimal disruptions.
Let's share experiences for better performances issues.
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