1.Key Concepts

Key Concepts

USE Method

USE Method For Every resource(with the scope of resource), check :

1. Utilisation (Busy Time)
2. Saturation (Queue length or required time)
3. Errors ( Easy to interpret)

USE Method

RED Method For Every resource(with the scope of resource), check :

1. Rate
2. Errors
3. Duration.

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• OS Performance
• Performance Tuning
  • CPU Bound
  • Memory Bound
  • I/O Bound
• GC Tuning
  • GC Algorithms
  • GC Algorithm Choosing
  • GC Logging
  • GC Log Analysis
  • Excessive Garbage Collection
• Memory : RAM
  • Memory Leak
  • Memory Saturation | Insufficient Memory
  • Upgrading to next Generation
  • Memory Exceptions
  • Slow RAM Hardware
• Resources
  • CPU
  • RAM
  • Disk
  • N/W Band Width
    • Compression
    • N/W latency
    • Connectivity Problems
• API Performance
• DB Performance
  • Oracle
  • MySQL
  • Cassandra/NO SQL
  • Data Access layer
  • Data Base Performance
  • Slow queries
  • Insufficient database resources
  • Unused indexes
• JVM Run Time Memory
• Thread Pools
• Monitoring
• Environment:
  • OnPremise
  • Cloud
• Performance Test Tools
  • Jmeter
• Caching
• Concurrency
• Application Architecture
  • ScaleUp
  • ScaleOut
• Connection Pool
• Connection Leak
• Thread Pooling
• Thread Contention
• Thread Saturation
• Thread coordination
• DeadLock
• Locks
• String Operations
• Synchronisation
• CPU/Server Room Temparature
• STW -Stop the World
• Latency
• Throughput
• Thread
• Stack
• Heap
• GC Log
• GC Pauses
• GC Algorithems
• GC Root
• Thread Dump
• Heap Dump
• JMX
• Java Profilers
• DB Tuning
• Java Flight Recorder
• Collections
• Streams
• Implementing Timeouts
• Memory Efficient Libraries
• may not be written to work with multiple CPU streams
• Third-Party Systems May Behave in Unexpected Ways
• Unexpected Network Delays
• Data Growth/Data Pressure in Database Systems Will Slow Down Your System

Memory Leak Trend Graph

Dead Lock Symptoms

Resource Saturation Symptoms

CPU Bottleneck

CPU bottleneck shows up in two forms: a processor running at over 80 percent capacity for an extended period of time, and an overly long processor queue

DB Performance Tunning

Oracle DB

Input : AWR : Automatic Workload Repository

• By going through the AWR Report we can easily solve issues like:
  • slow database,
  • high wait events,
  • slow query and many more issues
• Things to look into AWR report