Look at nmon; I run it from cron, then email it to myself after midnight. I
also have bunches of scripts that run - some every 5 seconds, to notify me if,
say, paging space usage on any system exceeds 30%, file systems exceed 85%
full, passwords change, sudo is invoked, hosts, hosts.equiv, cron, etc.,
changes.
One useful thing to look at is vmstat -v | grep block. If you see the values
there changing over time, you'll need to do some tweaking. This is part of the
nmon output, so you can track it over time easily, if you use nmon. Manually,
try it an hour apart. if no changes, try 24 hours. keep the output around, and
when you're experiencing a heavy load, look again. It resets to zero at boot,
so big numbers mean something has happened in the past (or you haven't rebooted
in far too long).
I have Mark's Hitchhiker's guide series (backed up in 6 or 7 places), but I'd
need his permission to send 'em. Mark? I know that when U2 was IBM, whether or
not Mark got to publish such over-the-top useful articles depended on how many
people downloaded them. Reading and understanding even a few sentences any of
Mark's articles makes you an instant SME, and guarantees that your capability
to add value is enhanced. If you come across them, download them, and ask
Rocket for more. More. MORE! With the exception of Clif Oliver and possibly one
or two others, Mark is like Hank Williams in Leonard Cohen's "Tower of Song" -
a hundred floors above us.
Two other authors I've found useful you may want to search on are Ken Milberg &
Jaqui Lynch; both deal with AIX tuning. Be sure to be looking at AIX 5.3; there
were some major changes to AIX tuning between 5.1 & 5.3, and some of those
changes are a 180 degree change (for example, maxperm, maxclient, and
lru_file_repage).
You can find a lot of the new settings in /etc/tunables/lastboot.
I've found the truss command to be amazingly helpful, but you have to have some
understanding of system calls & error messages in order to interpret it. It
captures all of the system calls made by a process (the -f option follows all
of the forks, as well). Even without knowing what each system call does, you
can see if it's hanging, looping, waiting, etc.
svmon is a good tool; svmon -U will tell you more than you want to know about
each user's memory map.
FILE.USAGE is a very powerful tool in UV. It has some impact on performance if
you run it for a lot of files.
Having specialized in tuning U2 on AIX for a while, I have a few docs (How to
look at topas, tuning with ioo, vmo) that I need to update & cleanup, and
perhaps submit to Spectrum.
Obviously, FAST (no relation) is an excellent tool.
<AD/> I occasionally moonlight remotely, and as I mentioned, tuning UV on AIX
is my specialty niche. I bring a program that exports ANALYSE.FILE data & runs
some analytics into an .xls file, from which we can target your most poorly
sized hashed files, in addition to 20 years in U2 & 15+ years in AIX. Usually,
with the tools and knowledge transfer I leave behind, you won't feel the need
for outside help again.</AD>
> From: stuart.boyd...@spotless.com.au
> To: u2-users@listserver.u2ug.org
> Date: Thu, 20 Jan 2011 16:03:36 -0800
> Subject: [U2] [UV][AIX] System Management and Performance Tools
>
> Hi,
> Just wondering if anyone has any recommendations for systems
> monitoring/management tools for aix5.3/uv10.2.4. I've seen occasional
> discussions on the topic here over the years.
> Ideally, what we would like to do is be able to track down those end of month
> type processes which bog the system down with CPU & IO bottlenecks during
> peak load periods.
> I suppose this could be done with something like topas, truss and PORT.STATUS
> but just wondering what is available.
> There was a tool called "DPMonitor" that looked like it could be suitable -
> does this exist in any form?
> Also, does anyone know if the "Travels with Mark: A Hitchhiker's Guide to the
> UniVerse<http://www.google.com/url?sa=t&source=web&cd=1&sqi=2&ved=0CBIQFjAA&url=http%3A%2F%2Fwww.mail-archive.com%2Fu2-users%40listserver.u2ug.org%2Fmsg13400.html&rct=j&q=dm-dw-dm-0512baldridge-i&ei=jMs4TavnI4mYvAOC0uiJCg&usg=AFQjCNGTQCWE14j2-XEP6lQSFjTnMi98Zg&cad=rja>"
> series on performance tuning is available anywhere. It was on the IBM
> developerworks site but, no more.
>
> All suggestions gratefully received.
> Thanks in advance,
> Stuart Boydell
>
>
>
>
>
> _______________________________________________
> U2-Users mailing list
> U2-Users@listserver.u2ug.org
> http://listserver.u2ug.org/mailman/listinfo/u2-users
_______________________________________________
U2-Users mailing list
U2-Users@listserver.u2ug.org
http://listserver.u2ug.org/mailman/listinfo/u2-users
