Oracle Autonomous Health Framework (AHF)

1. Overview of AHF Components

1.1 Core Components

• Oracle ORAchk/QAcheck
• Oracle Trace File Analyzer (TFA)
• Oracle Cluster Health Advisor (CHA)
• Oracle Memory Guard
• Oracle Cluster Health Monitor (OS-WHF)
• Oracle Database QoS Management

2. Installation and Setup

2.1 Download and Install AHF

# Download AHF
wget https://download.oracle.com/otn_software/ahf/ahf.zip

# Extract the archive
unzip ahf.zip

# Run installation script
./ahf_setup

# Verify installation
ahf inventory

2.2 Configure Base Directory

# Set AHF_BASE directory
export AHF_BASE=/opt/oracle/ahf

# Add to system profile
echo "export AHF_BASE=/opt/oracle/ahf" >> /etc/profile.d/ahf.sh

3. Oracle ORAchk Configuration

3.1 Basic Health Checks

# Run comprehensive health check
orachk

# Run specific checks
orachk -profile database
orachk -profile asm
orachk -profile os

# Schedule recurring checks
orachk -schedule daily -email admin@example.com

3.2 Custom Health Checks

# Create custom profile
orachk -profile myprofile.xml -services "DATABASE,ASM,LISTENER"

# Run with custom profile
orachk -profile myprofile.xml

4. Trace File Analyzer (TFA)

4.1 TFA Setup

# Start TFA
tfactl start

# Configure trace directory
tfactl set repositorydir=/u01/app/tfa/repository

# Set retention period
tfactl set retention=30

4.2 Collecting Diagnostic Data

# Collect all diagnostic data
tfactl collect

# Collect specific timeframe
tfactl collect -from "2024-01-01 00:00:00" -to "2024-01-02 00:00:00"

# Collect for specific components
tfactl collect -components database,asm,os

4.3 Analyzing Trace Files

# Search trace files
tfactl analyze -search "ORA-00600"

# Generate summary report
tfactl analyze -summary

# View real-time alerts
tfactl print alerts

5. Cluster Health Advisor (CHA)

5.1 Enable CHA

-- Enable CHA from SQL*Plus
ALTER SYSTEM SET cluster_health_advisor=TRUE SCOPE=SPFILE;

-- Verify status
SELECT * FROM V$CLUSTER_HEALTH_ADVISOR;

5.2 Configure Monitoring

-- Set monitoring thresholds
BEGIN
  DBMS_CHA_ADMIN.SET_THRESHOLD(
    metric_name => 'CPU_Utilization',
    threshold_value => 90,
    evaluation_window => 300
  );
END;
/

-- View current settings
SELECT * FROM DBA_CHA_THRESHOLDS;

6. Memory Guard Configuration

6.1 Enable Memory Guard

-- Enable Memory Guard
ALTER SYSTEM SET memory_guard=TRUE SCOPE=BOTH;

-- Verify status
SELECT * FROM V$MEMORY_GUARD_STATUS;

6.2 Configure Thresholds

-- Set memory threshold
ALTER SYSTEM SET memory_guard_threshold=90 SCOPE=BOTH;

-- Monitor memory usage
SELECT * FROM V$MEMORY_GUARD_DETAIL;

7. OS Watchdog Health Framework (OS-WHF)

7.1 Configure OS-WHF

# Start OS-WHF
oswhfd start

# Configure monitoring interval
oswhfd config interval=60

# Set resource thresholds
oswhfd config threshold cpu=90 memory=85

7.2 Monitor System Health

# View current status
oswhfd status

# Generate health report
oswhfd report

# Check resource utilization
oswhfd resources

8. Database QoS Management

8.1 Enable QoS Management

-- Enable QoS Management
BEGIN
  DBMS_QOSM_ADMIN.ENABLE;
END;
/

-- Create performance policy
BEGIN
  DBMS_QOSM_ADMIN.CREATE_POLICY(
    policy_name => 'PROD_POLICY',
    description => 'Production Database Policy'
  );
END;
/

8.2 Configure Performance Classes

-- Create performance class
BEGIN
  DBMS_QOSM_ADMIN.CREATE_PERF_CLASS(
    policy_name => 'PROD_POLICY',
    perf_class_name => 'OLTP_CLASS',
    description => 'OLTP Workload Class'
  );
END;
/

-- Set performance objectives
BEGIN
  DBMS_QOSM_ADMIN.SET_OBJECTIVE(
    policy_name => 'PROD_POLICY',
    perf_class_name => 'OLTP_CLASS',
    objective => 'LATENCY',
    value => 100
  );
END;
/

9. Best Practices

9.1 Monitoring Recommendations

• Schedule regular health checks using ORAchk
• Configure email notifications for critical alerts
• Maintain proper retention periods for diagnostic data
• Review health check reports regularly
• Set appropriate thresholds for your environment

9.2 Maintenance Tasks

• Regular cleanup of diagnostic files
• Update AHF components periodically
• Validate health check profiles
• Review and adjust thresholds
• Monitor space usage in repository

9.3 Troubleshooting Tips

• Check AHF logs in $AHF_BASE/log
• Verify component status regularly
• Monitor alert logs for AHF-related messages
• Review component-specific trace files
• Maintain documentation of custom configurations