Issue 1002465: MemoryError on AIX52 (original) (raw)

This issue has been migrated to GitHub: https://github.com/python/cpython/issues/40678

classification

process

Created on 2004-08-03 08:04 by richardjmason, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Messages (5)
msg21916 - (view)	Author: Datranet (richardjmason)	Date: 2004-08-03 08:04
I found the orginal problem when trying to send large email attachments on AIX 5.2. I tracked the issue down to the fact that a string can only grow to a very restricted size on AIX 5.2. bin2ascii fails at the pint the function tries to join the list togther to form 1 string. I wrote the following test program to prove the issue: a = '' cnt = 0 while cnt < 1024: a = a + 'x' cnt += 1 c = '' cnt = 0 while cnt < 1024: c = c + a cnt += 1 b = '' cnt2 = 0 while 1: b = b + c cnt2 += 1 print cnt2 On AIX 5.2 you get a MemoryError with a cnt2 value of 42. I can run the test program on all other platforms and get a cnt2 value over 150 before stopping to program myself. I have tried the binary python 2.2 from the IBM site and building python 2.3.4 myself using the gcc from the IBM site. Both fail with a cnt2 value of 42. Can anyone please advise on how to get AIX 5.2 to allow single objects to have more memory allocated.
msg21917 - (view)	Author: Martin v. Löwis (loewis) *	Date: 2004-08-04 18:09
Logged In: YES user_id=21627 You need to use a debugger to find the cause of the problem. What is the string parameter of the MemoryError? This might give a clue where precisely it is raised.
msg21918 - (view)	Author: Michael Hudson (mwh)	Date: 2004-08-05 11:59
Logged In: YES user_id=6656 A way this has happened in the past is calling "malloc(0)", which is entitled to return NULL and Python then thinks this is a memory error. This doesn't seeme especially likely here, though. Agree with Martin that you're probably going to need to use a debugger.
msg21919 - (view)	Author: Neal Norwitz (nnorwitz) *	Date: 2005-10-03 05:23
Logged In: YES user_id=33168 richardjmason, are you still having this problem?
msg21920 - (view)	Author: SourceForge Robot (sf-robot)	Date: 2006-03-07 03:25
Logged In: YES user_id=1312539 This Tracker item was closed automatically by the system. It was previously set to a Pending status, and the original submitter did not respond within 14 days (the time period specified by the administrator of this Tracker).