Re: [Maxima-discuss] gcl memory usage

[David S. <d.s...@go...>]

Hi,

I'm not sure whether Gunter's recent change ...

export GCL_MEM_MULTIPLE=0.2

... does what it is intended to do.

According to his comment, this is supposed to influence the garbage
collection behavior.
But according to
https://lists.gnu.org/archive/html/gcl-devel/2017-09/msg00000.html, this
actually limits Maxima's total memory usage to 20% of RAM. On a system with
5 GB of RAM, Maxima will see only 1 GB.

I don't think it's a good idea to artificially limit RAM usage. If need to
work on a huge problem and have lots of RAM, I want Maxima to be able to
make use of that RAM.

Best regards
David Scherfgen

2018-04-22 17:46 GMT+02:00 Gunter Königsmann <gu...@pe...>:

> The thing with the 3/4 I didn't know. Where is it documented?
>
> Kind regards,
>
> Gunter.
>
> Am 22. April 2018 13:57:45 MESZ schrieb Camm Maguire <
> ca...@ma...>:
>>
>> Greetings!
>>
>> Gunter Königsmann <gu...@pe...> writes:
>>
>>
>>>>  gcl's decision to consume all available memory before GCing seems very
>>>>  unfriendly, and would seem to make the GC pause huge.
>>>>
>>>>
>> By default GCL will start gc at 1/2 physical memory, then progressively
>> increase aggressivity to maximum at 3/4.  The parameters are all
>> adjustable with environment variable settings.
>>
>>
>>>  What I like about gcl is that if you start several maxima instances at
>>>  the same time they seem to be able to communicate about which instance
>>>  uses how much memory.
>>>
>>>
>> Glad to see this feature is getting some exercise, as I think it needs
>> to be turned on by default at release.  There is a small overhead which
>> I regret, but communicating to multi-instance users how to setup their
>> environment seems to forbidding an alternative.
>>
>> Thanks for all your work on maxima!
>>
>> Take care,
>>
>>
>>  I've now committed the 2nd patch.
>>>
>>>  The 1st try to do so resulted in a "bad gateway" error. The 2nd one
>>>  worked with public key auth again => seems like sf.net is currently
>>>  working on the git stack.
>>>
>>>  Kind regards,
>>>
>>>     Gunter.
>>> ------------------------------
>>>  Check out the vibrant tech community on one of the world's most
>>>  engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>>> ------------------------------
>>>  Maxima-discuss mailing list
>>>  Max...@li...
>>>  https://lists.sourceforge.net/lists/listinfo/maxima-discuss
>>>
>>>
>>>
>>>
> --
> Diese Nachricht wurde von meinem Android-Gerät mit K-9 Mail gesendet.
>
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Maxima-discuss mailing list
> Max...@li...
> https://lists.sourceforge.net/lists/listinfo/maxima-discuss
>
>