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Full Discussion: expanding RAM
Operating Systems Solaris expanding RAM Post 302530155 by bartus11 on Monday 13th of June 2011 05:57:30 AM
Old 06-13-2011
Observe output of vmstat 2 5 during few times of the day when the server/database is most busy. If you constantly see high numbers in pi, po or fr columns, then adding memory could probably increase performance.
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PMAP(1) 							Linux User's Manual							   PMAP(1)

NAME
pmap - display information about process memory mappings SYNOPSIS
pmap [ -d | -q | -h | -V | -A low,high ] pid DESCRIPTION
pmap(1) displays information about a process's memory mappings, such as its stack, data segment, mapped files, and so on. The pmap(1) utility will show, for each mapping of a given process, the starting byte address in the process's address space, the size, the RSS (size of the mapping in physical memory), the amount of dirty pages, the permission, the device node, the offset, and the file backing the mapping, if any. As the last line of output, the pmap(1) utility will tally up the total size of all mappings as well as show the total size of writable/private mappings and of shared mappings. OPTIONS
d, --device Display major and minor device numbers. A, --limit=low,high Limit results to the given range. q, --quiet Hide header and memory statistics. h, --help Show pmap usage. V, --version Display version information. FILES
/proc/pid/maps and /proc/pid/smaps -- memory mapping information SEE ALSO
ps(1), top(1), free(1), vmstat(1) AUTHORS
Written by Chris Rivera. The procps package is maintained by Albert Calahan. Please send bug reports to <albert@users.sf.net>. Linux 12 Oct 2005 PMAP(1)
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