I/O Indicators ( last 24 hours)
I/O read latency measures how long it takes to read data from disk. 
High latency can severely impact SAP system performance, especially for database-heavy operations. 
The Red LED status confirms this is a critical alert. 
 
1. Check Disk Performance 
 
Use OS-level tools like iostat, vmstat, or sar to monitor disk I/O. 
Look for high wait times (%iowait) or overloaded disks. 
 
2. Database Health Check 
 
If this is an SAP HANA system, use HANA Studio  
 
Expensive statements 
Long-running queries 
Table loads or column store issues 
 
Review SAP Notes related to I/O latency: 
 
SAP Note 1999938 – HANA I/O performance troubleshooting 
SAP Note 2018196 – Guidelines for I/O performance 
 
5. Temporary Workarounds 
 
Restarting the database or clearing cache may temporarily reduce latency. 
However, this is not a long-term fix and should be done with caution.