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AIX 5L Practical Performance Tools and Tuning Guide by IBM Redbooks

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2.2. Memory overview

To analyze memory, you first need to know how much memory you have. Example 2-5 on page 32 demonstrates how to find out how much memory your system has.

Example 2-5. Using lsattr
[node4][/]> lsattr -El mem0
goodsize 8192 Amount of usable physical memory in Mbytes False
size     8192 Total amount of physical memory in Mbytes  False

The lsattr command will report the amount of memory in MB, so in the example above the machine has 8GB of memory.

2.2.1. Virtual memory manager (VMM) overview

In a multi-user, multi-processor environment, the careful control of system resources is paramount. System memory, whether paging space or real memory, when not carefully managed, can result in poor performance and even program and application ...

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