8.11. Memory Metrics
A variety of global and per-process metrics are available for identifying potential bottlenecks in memory.
8.11.1. Global Memory Saturation Metrics
Global memory saturation metrics (provided by glance, gpm, and vmstat) tell whether the memory system as a whole is saturated. These include:
Free memory in KB or pages
Active virtual memory (avm) in the last twenty seconds
Available memory (physical memory, kernel memory, fixed-buffer cache memory)
The most useful global saturation metric is free memory.
8.11.2. Global Memory Queue Metrics
The only queue relating to memory is the number of processes blocked on VM. MeasureWare gives this as a count; glance and gpm show this as a percentage of time blocked on VM.
8.11.3. Other Global ...
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