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Operating Systems AIX Command to fresh the memory ! Post 302370826 by zxmaus on Thursday 12th of November 2009 01:42:13 PM
Old 11-12-2009
I came today across an undocumented command that might do what you want if you have bos.perf.tools installed - but I would be very careful doing this EVER on a production system: /usr/lib/perf/crush

It basically tells the VMM's page stealer to switch to an "aggressive" mode that may end up freeing pages that applications have not touched in a while.

usage:
Code:
/usr/lib/perf/crush <integer>

you calculate the integer using output from 'svmon -G' : memory size total - memory pinned = <integer>

Rumor has it that it was developed for internal IBM use to clean memory pages before running benchmark applications.

Your applications might slow down for a moment but you will see a much bigger free list afterwards.

Kind regards
zxmaus
 

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lastcomm(1)						      General Commands Manual						       lastcomm(1)

NAME
lastcomm - show last commands executed in reverse order SYNOPSIS
[commandname] ... [username] ... [terminalname] ... DESCRIPTION
gives information on previously executed commands. If no arguments are specified, prints information about all the commands recorded in the accounting file, during the current accounting file's lifetime. If called with arguments, only accounting entries with a matching com- mand name, user name, or terminal name are printed. For example, to produce a listing of all executions of commands named by user on ter- minal use: For each process entry, the following are printed. o Name of the user who ran the process. o Flags, as accumulated by the accounting facilities in the system. o Command name under which the process was called. o Amount of cpu time used by the process (in seconds). o What time the process started. Flags are encoded as follows: Command was executed by a user who has appropriate privileges. Command ran after a fork, but without a following exec. Command terminated with the generation of a file. Command was terminated with the signal SIGTERM. AUTHOR
was developed by the University of California, Berkeley. FILES
current file for per-process accounting SEE ALSO
last(1), acct(4), acctsh(1M), core(4). lastcomm(1)
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