10-04-2009
Bakunin,
if you were right, this would happen to all users, including root ? At least on my boxes, all userprocesses are impacted, when I have a rogue process eating the memory + paging area.
My best guess would be number of runnable processes that is likely unlimited for root user but for sure not for the others (there it is 2000 by default and this value is system wide set per user, no matter how many processes the user himself runs), if you have a very busy box, it can add up very fast since every oracle query forks several processes. Changing the value for testing for one of the impacted users if the problem occurs would prove me right or wrong.
My thought would go as well into the memory direction but rather pinned memory than paging - how much memory is pinned on the systems? AIX can only pin about 85% in total and the longer the kernel is up, the more memory is pinned by it. If you have already a high amount of pinnend memory right after the reboot - for example by pinning your databases into memory (what is btw real bad practice and on AIX just not required accept you are using very large pages), you can see sometimes this kind of issues without having full paging areas ...
Kind regards
zxmaus
Last edited by zxmaus; 10-04-2009 at 03:30 AM..
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LEARN ABOUT CENTOS
uptime
UPTIME(1) User Commands UPTIME(1)
NAME
uptime - Tell how long the system has been running.
SYNOPSIS
uptime [options]
DESCRIPTION
uptime gives a one line display of the following information. The current time, how long the system has been running, how many users are
currently logged on, and the system load averages for the past 1, 5, and 15 minutes.
This is the same information contained in the header line displayed by w(1).
System load averages is the average number of processes that are either in a runnable or uninterruptable state. A process in a runnable
state is either using the CPU or waiting to use the CPU. A process in uninterruptable state is waiting for some I/O access, eg waiting for
disk. The averages are taken over the three time intervals. Load averages are not normalized for the number of CPUs in a system, so a
load average of 1 means a single CPU system is loaded all the time while on a 4 CPU system it means it was idle 75% of the time.
OPTIONS
-p, --pretty
show uptime in pretty format
-h, --help
display this help text
-s, --since
system up since, in yyyy-mm-dd MM:HH:SS format
-V, --version
display version information and exit
FILES
/var/run/utmp
information about who is currently logged on
/proc process information
AUTHORS
uptime was written by Larry Greenfield <greenfie@gauss.rutgers.edu> and Michael K. Johnson <johnsonm@sunsite.unc.edu>
SEE ALSO
ps(1), top(1), utmp(5), w(1)
REPORTING BUGS
Please send bug reports to <procps@freelists.org>
procps-ng December 2012 UPTIME(1)