Ref: Optimizing Linux® Performance: A Hands-On Guide to Linux® Performance Tools Ref:http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/admin-primer/s1-resource-what-to-monitor.html Ref:http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/admin-primer/s1-resource-rhlspec.html Basic explanation of memory related words: Swap (Not Enough Physical Memory) All systems have a fixed amount of physical memory in the form of RAM chips. The Linux kernel allows applications to run even if they require more memory than available with [...]