Fredrik Lundh wrote:
Christopher Subich wrote:
I have access to an itanium system with a metric ton of memory. I
-think- that the Python version is still only a 32-bit python
an ILP64 system is a system where int, long, and pointer are all 64 bits,
so a 32-bit python on a 64-bit platform
Christopher Subich wrote:
anyone out there with an ILP64 system?
I have access to an itanium system with a metric ton of memory. I
-think- that the Python version is still only a 32-bit python
an ILP64 system is a system where int, long, and pointer are all 64 bits,
so a 32-bit python on a
Gerald Klix [EMAIL PROTECTED] schrieb im Newsbeitrag
news:[EMAIL PROTECTED]
Did you consider the mmap library?
Perhaps it is possible to avoid to hold these big stings in memory.
BTW: AFAIK it is not possible in 32bit windows for an ordinary programm
to allocate more than 2 GB. That
Fredrik Lundh wrote:
Harald Karner wrote:
python -c print len('m' * ((2048*1024*1024)-1))
2147483647
the string type uses the ob_size field to hold the string length, and
ob_size is an integer:
$ more Include/object.h
...
int ob_size; /* Number of items in variable part */
works with a 10 MByte string without any problem.
So what? Is there no compression support for large sized strings in Python?
Am I doing something the wrong way here?
Is there any and if yes, what is the theoretical upper limit of string size
which can be processed by each of the compression
consuming 99% of CPU time
The same works with a 10 MByte string without any problem.
So what? Is there no compression support for large sized strings in Python?
you're probably measuring windows' memory managment rather than the com-
pression libraries themselves (Python delegates all memory
On this system (Linux 2.6.x, AMD64, 2 GB RAM, python2.4) I am able to
construct a 1 GB string by repetition, as well as compress a 512MB
string with gzip in one gulp.
$ cat claudio.py
s = '1234567890'*(1048576*50)
import zlib
c = zlib.compress(s)
print len(c)
to decompress running endlessly consuming 99% of CPU time
bz2 fails to compress running endlessly consuming 99% of CPU time
The same works with a 10 MByte string without any problem.
So what? Is there no compression support for large sized strings in
Python?
you're probably measuring windows
pylzma fails to decompress running endlessly consuming 99% of CPU time
bz2 fails to compress running endlessly consuming 99% of CPU time
The same works with a 10 MByte string without any problem.
So what? Is there no compression support for large sized strings in
Python?
you're probably
Gerald Klix a écrit :
Did you consider the mmap library?
Perhaps it is possible to avoid to hold these big stings in memory.
BTW: AFAIK it is not possible in 32bit windows for an ordinary programm
to allocate more than 2 GB. That restriction comes from the jurrasic
MIPS-Processors, that
Christophe wrote:
Did you consider the mmap library?
Perhaps it is possible to avoid to hold these big stings in memory.
BTW: AFAIK it is not possible in 32bit windows for an ordinary programm
to allocate more than 2 GB. That restriction comes from the jurrasic
MIPS-Processors, that
I was also able to create a 1GB string on a different system (Linux 2.4.x,
32-bit Dual Intel Xeon, 8GB RAM, python 2.2).
$ python -c 'print len(m * 1024*1024*1024)'
1073741824
I agree with another poster that you may be hitting Windows limitations
rather
than Python ones, but I am certainly not
Claudio Grondi wrote:
Anyone on a big Linux machine able to do e.g. :
\python -c print len('m' * 2500*1024*1024)
or even more without a memory error?
I tried on a Sun with 16GB Ram (Python 2.3.2)
seems like 2GB is the limit for string size:
python -c print len('m' * 2048*1024*1024)
Harald Karner wrote:
I tried on a Sun with 16GB Ram (Python 2.3.2)
seems like 2GB is the limit for string size:
python -c print len('m' * 2048*1024*1024)
Traceback (most recent call last):
File string, line 1, in ?
OverflowError: repeated string is too long
python -c print len('m' *
Harald Karner [EMAIL PROTECTED] schrieb im Newsbeitrag
news:[EMAIL PROTECTED]
Claudio Grondi wrote:
Anyone on a big Linux machine able to do e.g. :
\python -c print len('m' * 2500*1024*1024)
or even more without a memory error?
I tried on a Sun with 16GB Ram (Python 2.3.2)
seems like
Claudio Grondi [EMAIL PROTECTED] wrote:
...
In this context I am very curious how many of such
2 GByte strings is it possible to create within a
single Python process?
VM (Virtual Memory) may make the issue difficult to answer precisely.
With a Python build for 64-bit addressing (and
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