[Magick-bugs] Error : Memory allocation failed `No such file or directory'

[Ilya Zakharevich]

[A complimentary Cc of this posting was sent to

<duc.sequere.aut.de.via.decede at imagemagick.org>], who wrote in article <200901220422.n0M4M4GC003351 at studio.imagemagick.org>:
> > Could you be more precise, please?
> 
> See http://www.imagemagick.org/script/resources.php and
> http://www.imagemagick.org/script/architecture.php.

No, it did not explain why

  These resource limits reduce the large memory (.e.g > 1mb) requests
  to ensure there is enough memory for the little requests (.e.g. <
  1mb) ImageMagick requires.

Finally, I spend an hour to read sources.  Could one add this to
documentation of -limit:

=======================================================
    Requests for buffers to keep intermediate images are satisfied
    from one of 3 pools: in-memory pool, memory-mapped files pool, and
    disk files pool (in this order) depending on the -limit settings.
    If the total size of allocated buffers in the given pool would
    reach the corresponding limit, the request is passed to the next
    pool.

    Additionally, requests of size "-limit area" or above are never
    allocated from in-memory pool.  In particular, if one has about
    400mb of free memory, and wants to avoid swapping by keeping
    larger requests on disk (thus allowing little requests, e.g.,
    <10mb, to be in memory), use

	  -limit area 10mb -limit memory 400mb

    For these setting, 1kb=1024b.  (To find which requests are
    performed, use -debug cache, and grep for memory|open|destroy|disk.)
=======================================================

Thanks,
Ilya