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From: Terry Reedy on 25 Jan 2010 15:07
On 1/25/2010 2:05 PM, Alexander Moibenko wrote:
> I have a simple question to which I could not find an answer.

Because it has no finite answer

> What is the total maximal size of list including size of its elements?

In theory, unbounded. In practice, limited by the memory of the interpreter.

The maximum # of elements depends on the interpreter. Each element can
be a list whose maximum # of elements ..... and recursively so on...

Terry Jan Reedy

From: AlexM on 25 Jan 2010 15:15
On Jan 25, 2:03 pm, "Diez B. Roggisch" <de...(a)nospam.web.de> wrote:
> Am 25.01.10 20:39, schrieb AlexM:
>
> > On Jan 25, 1:23 pm, "Diez B. Roggisch"<de...(a)nospam.web.de>  wrote:
> >> Am 25.01.10 20:05, schrieb Alexander Moibenko:
>
> >>> I have a simple question to which I could not find an answer.
> >>> What is the total maximal size of list including size of its elements?
> >>> I do not like to look into python source.
>
> >> But it would answer that question pretty fast. Because then you'd see
> >> that all list-object-methods are defined in terms of Py_ssize_t, which
> >> is an alias for ssize_t of your platform. 64bit that should be a 64bit long.
>
> >> Diez
>
> > Then how do explain the program output?
>
> What exactly? That after 3GB it ran out of memory? Because you don't
> have 4GB memory available for processes.
>
> Diez

Did you see my posting?
.....
Here is what I get on 32-bit architecture:
cat /proc/meminfo
MemTotal: 8309860 kB
MemFree: 5964888 kB
Buffers: 84396 kB
Cached: 865644 kB
SwapCached: 0 kB
......

I have more than 5G in memory not speaking of swap space.
From: AlexM on 25 Jan 2010 15:21
On Jan 25, 2:07 pm, Terry Reedy <tjre...(a)udel.edu> wrote:
> On 1/25/2010 2:05 PM, Alexander Moibenko wrote:
>
> > I have a simple question to which I could not find an answer.
>
> Because it has no finite answer
>
> > What is the total maximal size of list including size of its elements?
>
> In theory, unbounded. In practice, limited by the memory of the interpreter.
>
> The maximum # of elements depends on the interpreter. Each element can
> be a list whose maximum # of elements ..... and recursively so on...
>
> Terry Jan Reedy

I am not asking about maximum numbers of elements I am asking about
total maximal size of list including size of its elements. In other
words:
if size of each list element is ELEMENT_SIZE and all elements have the
same size what would be the maximal number of these elements in 32 -
bit architecture?
I see 3 GB, and wonder why? Why not 2 GB or not 4 GB?
AlexM
AlexM
From: Alf P. Steinbach on 25 Jan 2010 15:37
* AlexM:
> On Jan 25, 2:07 pm, Terry Reedy <tjre...(a)udel.edu> wrote:
>> On 1/25/2010 2:05 PM, Alexander Moibenko wrote:
>>
>>> I have a simple question to which I could not find an answer.
>> Because it has no finite answer
>>
>>> What is the total maximal size of list including size of its elements?
>> In theory, unbounded. In practice, limited by the memory of the interpreter.
>>
>> The maximum # of elements depends on the interpreter. Each element can
>> be a list whose maximum # of elements ..... and recursively so on...
>>
>> Terry Jan Reedy
>
> I am not asking about maximum numbers of elements I am asking about
> total maximal size of list including size of its elements. In other
> words:
> if size of each list element is ELEMENT_SIZE and all elements have the
> same size what would be the maximal number of these elements in 32 -
> bit architecture?
> I see 3 GB, and wonder why? Why not 2 GB or not 4 GB?

At a guess you were running this in 32-bit Windows. By default it reserves the
upper two gig of address space for mapping system DLLs. It can be configured to
use just 1 gig for that, and it seems like your system is, or you're using some
other system with that kind of behavior, or, it's just arbitrary...


Cheers & hth.,

- Alf (by what mechanism do socks disappear from the washer?)
From: Diez B. Roggisch on 25 Jan 2010 15:42
Am 25.01.10 21:15, schrieb AlexM:
> On Jan 25, 2:03 pm, "Diez B. Roggisch"<de...(a)nospam.web.de> wrote:
>> Am 25.01.10 20:39, schrieb AlexM:
>>
>>> On Jan 25, 1:23 pm, "Diez B. Roggisch"<de...(a)nospam.web.de> wrote:
>>>> Am 25.01.10 20:05, schrieb Alexander Moibenko:
>>
>>>>> I have a simple question to which I could not find an answer.
>>>>> What is the total maximal size of list including size of its elements?
>>>>> I do not like to look into python source.
>>
>>>> But it would answer that question pretty fast. Because then you'd see
>>>> that all list-object-methods are defined in terms of Py_ssize_t, which
>>>> is an alias for ssize_t of your platform. 64bit that should be a 64bit long.
>>
>>>> Diez
>>
>>> Then how do explain the program output?
>>
>> What exactly? That after 3GB it ran out of memory? Because you don't
>> have 4GB memory available for processes.
>>
>> Diez
>
> Did you see my posting?
> ....
> Here is what I get on 32-bit architecture:
> cat /proc/meminfo
> MemTotal: 8309860 kB
> MemFree: 5964888 kB
> Buffers: 84396 kB
> Cached: 865644 kB
> SwapCached: 0 kB
> .....
>
> I have more than 5G in memory not speaking of swap space.

Yes, I saw your posting. 32Bit is 32Bit. Do you know about PAE?

http://de.wikipedia.org/wiki/Physical_Address_Extension

Just because the system can deal with more overall memory - one process
can't get more than 4 GB (or even less, through re-mapped memory).
Except it uses specific APIs like the old hi-mem-stuff under DOS.

Diez
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