HP-UX 11i Tuning and Performance

Chapter 8. Memory Bottlenecks

This chapter describes major memory bottlenecks, starting with a review of some important concepts in the area of memory management. This is followed by a description of typical bottleneck symptoms and some techniques for diagnosing and tuning them. Chapter 8 covers the following topics:

• Virtual Address Space Layouts

• Adaptive Address Space

• Variable-Sized Pages

• Cell Local Memory Allocation

• Paging, Swapping, and Deactivation

• Dynamic Buffer Cache

• Memory-Mapped Files and Semaphores

• Process and Thread Execution using Fork() and Vfork()

• Sticky Bit

• Malloc()

• Shared Memory

• Shared Libraries

• Memory Management Policies

• Sizing Memory and the Swap Area

• Memory Metrics

• Types of Memory Management Bottlenecks

• Expensive System Calls

• Tuning Memory ...