l i n u x - u s e r s - g r o u p - o f - d a v i s
Next Meeting:
July 7: Social gathering
Next Installfest:
Latest News:
Jun. 14: June LUGOD meeting cancelled
Page last updated:
2004 Sep 23 01:00

The following is an archive of a post made to our 'vox mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox] [fwd] [svlug] mission critical computing and air safety
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox] [fwd] [svlug] mission critical computing and air safety

On Wed, Sep 22, 2004 at 12:48:34PM -0700, Mark K. Kim wrote:
> Unfortunately, you can't stop & restart processes like daemons on
> Windows as easily as you can on Linux or UNIX.  If the daemons have
> problems, you're stuck and have very little choice but to restart
> the whole system.

Well, assuming you still have the RAM to work with the GUI, you can go
to the services management panel and restart the service there. If
you're administering by anything that uses a command line (assuming
such a thing is possible), then use the net command, specifically "net
stop ServiceName" "net start ServiceName".

Am I missing some practical limitation to this?

> But leaky daemons is a problem with UNIX & co as well as Windows.
> UNIX is not leak-proof... just imaging going through all the daemons
> and restarting them one-by-one to find the daemon with leaky memory!
> -- might as well just reboot...

One word: top

And how long do our mission critical servers usually last on Linux?
Much longer than 49.7 days. (Although I probably concur with Rob
Rodgers' opinion that it's the clock. When I first read it, I assumed
it was some kind of open file limit, and that the application was
leaking file handles.)

> Last time I was at UCD, both the CS and the EE departments regularly
> rebooted their computers -- Linux, HPUX, Sun, SGI, etc.  Of course,
> this is all done automatically, and the EE department had the
> sensibility to reboot only if nobody's logged into the system.

They still do.

> On Wed, 22 Sep 2004, Ken Bloom wrote:
> > On Wed, Sep 22, 2004 at 12:04:17PM -0700, Rod Roark wrote:
> > > On Wednesday 22 September 2004 11:36 am, Tim Riley wrote:
> > >
> > > In general, the OS has no way to know when memory is in use
> > > by mistake (while the app is still running).  Regardless of
> > > whether a platform performs garbage collection (e.g. Java),
> > > it's not only possible but common for memory leaks to occur.
> > >
> > > > Should a person
> > > > have to reboot a computer every month to reset leaked memory?
> > >
> > > Of course not.  It's embarrassing.
> >
> > I would think that Windows, like Linux would free up all leaked memory
> > when the application terminated, and that it should be sufficient to
> > restart the application, rather than restarting the whole computer.
> >
> > Am I wrong about this?
> >
> > --Ken Bloom
> >
> > --
> > I usually have a GPG digital signature included as an attachment.
> > See http://www.gnupg.org/ for info about these digital signatures.
> >
> > G'mar Chatima Tova
> >
> -- 
> Mark K. Kim
> AIM: markus kimius
> Homepage: http://www.cbreak.org/
> Xanga: http://www.xanga.com/vindaci
> Friendster: http://www.friendster.com/user.php?uid=13046
> PGP key fingerprint: 7324 BACA 53AD E504 A76E  5167 6822 94F0 F298 5DCE
> PGP key available on the homepage
> _______________________________________________
> vox mailing list
> vox@lists.lugod.org

I usually have a GPG digital signature included as an attachment.
See http://www.gnupg.org/ for info about these digital signatures.

G'mar Chatima Tova

Attachment: signature.asc
Description: Digital signature

vox mailing list

LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
EDGE Tech Corp.
For donating some give-aways for our meetings.