[ILUG] anyone have any experience of java thread problems on linux ?

[Brian Foster]

  | Date: Wed, 8 May 2002 15:50:01 +0100
  | From: "Laur Ivan" <Laur.Ivan at corvil.com>
  | 
  | Hmm.  Zillions of threads are usually a bad thing :)  I'd go for
  | multiplexing: rather than having(/creating) a thread for each request,
  | get a limited (apache style..?) number of threads, each handling
  | requests from a pool.  It should greatly reduce the number of threads
  | you actually need to create.

 "how bad" zillions of threads are depends on the HW (CPU
 and caching), SW (OS and run-time libs), and duty cycle of
 the threads --- at least.  yes, generally, on most *ix systems
 I'd avoid zillions of executing threads (esp. if the threads
 are kernel-scheduled); but that needn't always apply on
 some RTOS/microkernel systems, and may not apply in some
 cases on specific HW platforms.

 however, from reading between the lines, I suspect the person
 who first raised this topic has no choice in the matter; the
 HW is a given, the application is zillion-threaded, and is
 not in that person's power to modify / request-to-be-modified
 (at least within an acceptable time-frame).   my apologies if
 my guessing is wrong here .....

 I must wonder, which such a large number of threads, just
 which Linux limit is being hit, which other limits might
 also be hit, and which of the limits are really hard?

cheers!
	-blf-
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