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- Path: sparky!uunet!pmafire!news.dell.com!swrinde!elroy.jpl.nasa.gov!ucla-cs!ucivax!megatek!randy
- From: randy@ninja.megatek.uucp (Randy Davis)
- Newsgroups: comp.sys.sun.admin
- Subject: Re: Amd is not perfect
- Message-ID: <1992Aug18.210041.18928@megatek.uucp>
- Date: 18 Aug 92 21:00:41 GMT
- References: <1992Aug5.231434.20156@trl.oz.au> <aegl.713467376@ossi.com> <cornell.714092734@vivaldi>
- Sender: randy@megatek.uucp (Randy Davis)
- Reply-To: megatek!randy@uunet.uu.net
- Organization: Megatek Corporation, San Diego, California
- Lines: 37
-
- In article <cornell.714092734@vivaldi> cornell@syl.dl.nec.com writes:
- |Jumping into this thread a little late but just wanted to contribute
- |a "me too". I'm running SunOS 4.1.1 on a network of Sun4s. I'm using
- |a combination of regular NFS mount and Sun's automount to mount file
- |systems from a Sun 4/470 w/128M RAM. Every few days, I see the problem
- |of the load average going up to around 6-12 and hanging there for a
- |while. A look at 'top' shows nfsd's sitting up at top. After a bit
- |it all goes back to normal. I can't reproduce it but it happens
- |quite often.
-
- That's not a problem with any of your mounts or NFS, most likely, but
- more likely one of your client machines doing a recursive directory/file
- search like a "find", "rm -r", etc. over NFS... Another likely culprit is
- someone doing high-speed small-size writes to a file (such as from a C-program)
- over NFS - this can take over all of your NFS daemons also, and can really
- cause trouble if it is writing into a partition that has quota's enabled
- and/or the filesystem is close to full.
-
- Next time it happens, fire up any network monitor utility (I use "ethertop")
- that will show you where packets are coming from that are destined for and
- originating from the machine that shows the NFS deamons taking up a high load.
- Once you locate the culprit machine, log into that machine and do a "w" or a
- "ps -agxu" (sometimes "w" won't show it) to find out who is running the
- offending program.
-
- Then tell them to "QUIT IT"... :-)
-
- Of course, you might want to make sure that *you* aren't doing it via a cron
- job that is improperly constructed - like a "find" without an "-xdev" option
- or somesuch.
-
- It used to happen all the time, here, and we have a network of about 140
- Sun4s (all flavors) and sun3s.
-
- Randy Davis UUCP: randy@megatek.com
- Network and System Administrator megatek!randy@uunet.uu.net
- Megatek Corporation, San Diego, California ucsd!megatek.uucp!randy
-