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Re: Thread question

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From	markspace <-@.>
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Subject	Re: Thread question
Date	Wed, 30 Nov 2011 06:04:14 -0800
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On 11/30/2011 5:50 AM, markspace wrote:
> On 11/30/2011 1:31 AM, Roedy Green wrote:
>
>> 1. some sort of throttle on releasing them that I don't swamp the JVM.
>
> I wouldn't bother. It's actually well known that for fast efficient IO
> you should start as many threads as possible. 21 threads aren't going to
> swamp anything.
>
> If you start to have in excess of say 100 to 1000 threads, then maybe
> you can think about a throttle. Until there's a chance of that many
> threads, you're just gold-plating your software.
>
> <http://en.wikipedia.org/wiki/Gold_plating_%28software_engineering%29>
>

Reading the docs carefully, it looks like Executors::newFixedThreadPool 
might only allocate new threads as it needs them, up to a maximum. 
Rather than say allocate the maximum number of specified threads 
immediately.  If it does, this would be ideal for throttling your tasks.

Even if it doesn't, a relatively small number of threads, say 
"newFixedThreadPool(50)" is probably much much easier than trying to 
invent some throttling mechanism yourself.

<http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/Executors.html#newFixedThreadPool%28int%29>

Thread

Thread question Roedy Green <see_website@mindprod.com.invalid> - 2011-11-30 01:31 -0800
  Re: Thread question Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-11-30 01:48 -0800
  Re: Thread question Roedy Green <see_website@mindprod.com.invalid> - 2011-11-30 02:32 -0800
    Re: Thread question Roedy Green <see_website@mindprod.com.invalid> - 2011-11-30 02:48 -0800
    Re: Thread question Patricia Shanahan <pats@acm.org> - 2011-11-30 03:11 -0800
      Re: Thread question Paul Cager <paul.cager@googlemail.com> - 2011-11-30 07:10 -0800
        Re: Thread question Patricia Shanahan <pats@acm.org> - 2011-11-30 09:34 -0800
    Re: Thread question Roedy Green <see_website@mindprod.com.invalid> - 2011-11-30 06:10 -0800
      Re: Thread question markspace <-@.> - 2011-11-30 06:13 -0800
      Re: Thread question Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-11-30 11:53 -0800
  Re: Thread question Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-30 07:28 -0500
    Re: Thread question markspace <-@.> - 2011-11-30 05:30 -0800
      Re: Thread question Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-30 21:04 -0500
        Re: Thread question markspace <-@.> - 2011-11-30 18:28 -0800
  Re: Thread question markspace <-@.> - 2011-11-30 05:50 -0800
    Re: Thread question markspace <-@.> - 2011-11-30 06:04 -0800
  Re: Thread question Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-11-30 11:48 -0800
  Re: Thread question Roedy Green <see_website@mindprod.com.invalid> - 2011-11-30 13:23 -0800

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