Messages in this thread | | | Date | Fri, 12 Jun 2009 21:48:41 -0600 | Subject | Re: IO latency - a special case | From | "Trenton D. Adams" <> |
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Sorry I didn't reply earlier. I got busy with some server troubles and such.
On Thu, Jun 11, 2009 at 1:11 PM, Theodore Tso<tytso@mit.edu> wrote: > On Sat, Jun 06, 2009 at 09:14:43PM -0600, Trenton D. Adams wrote: >> I'm back into doing some Java development, and it's happening again. >> I'm running 2.6.30-rc7, and I did a SysReq+T, I hope this is helpful. >> I've attached a txt.gz file, because it's 367K to my >> /var/log/messages. >> >> The important stuff, I believe, is the Java related stuff. As a quick >> refresher to this problem, it appears to be related to how my Java IDE >> saves the file, and perhaps something doesn't release the futex right >> away? > > Have you checked your memory usage via SysReq-m, or /proc/meminfo or > simply using "free". I'm seeing a lot of processes in do_page_fault, > which is interesting, especially in the non-Java processes.
I wasn't even aware of a SysReq-m. I'll try that next time. <rant>I do wish the Macbook had a hard drive activity light *rolls eyes*.</rant>
> > Back in April, your vmstat output didn't show much swapping activity, > but maybe there was more paging activity that didn't show up there?
Not sure I understand. Paging without swapping? I thought they were one in the same, please explain; it's been a long time since I studied kernel related theory.
> >> I've also seen these symptoms previously... >> >> 1. Problem arises, I Ctrl-C the process when I notice the system >> getting really sluggish. >> 2. Start process again, and it locks up the machine for about an hour > > What sort of process where you typicalling trying to kill using ^C?
It's maven, which spawns javac (java compiler), as well as does various other tasks such as making connections to the Internet, local directories, etc. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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