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2013-03-19T09:00:58.637
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2013-03-19T09:00:58.637
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You won't be able to allocate all the memory you can using constructs like <pre><code>s = ' ' * BIG_NUMBER </code></pre> It is better to append a list as in <pre><code>a = [] while True: print len(a) a.append(' ' * 10**6) </code></pre> Here is a longer code which gives more insight on the memory allocation limits: <pre><code>import os import psutil PROCESS = psutil.Process(os.getpid()) MEGA = 10 ** 6 MEGA_STR = ' ' * MEGA def pmem(): tot, avail, percent, used, free = psutil.virtual_memory() tot, avail, used, free = tot / MEGA, avail / MEGA, used / MEGA, free / MEGA proc = PROCESS.get_memory_info()[1] / MEGA print('process = %s total = %s avail = %s used = %s free = %s percent = %s' % (proc, tot, avail, used, free, percent)) def alloc_max_array(): i = 0 ar = [] while True: try: #ar.append(MEGA_STR) # no copy if reusing the same string! ar.append(MEGA_STR + str(i)) except MemoryError: break i += 1 max_i = i - 1 print 'maximum array allocation:', max_i pmem() def alloc_max_str(): i = 0 while True: try: a = ' ' * (i * 10 * MEGA) del a except MemoryError: break i += 1 max_i = i - 1 _ = ' ' * (max_i * 10 * MEGA) print 'maximum string allocation', max_i pmem() pmem() alloc_max_str() alloc_max_array() </code></pre> This is the output I get: <pre><code>process = 4 total = 3179 avail = 2051 used = 1127 free = 2051 percent = 35.5 maximum string allocation 102 process = 1025 total = 3179 avail = 1028 used = 2150 free = 1028 percent = 67.7 maximum array allocation: 2004 process = 2018 total = 3179 avail = 34 used = 3144 free = 34 percent = 98.9 </code></pre>
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1. POHow to Eat Memory using Python?
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1. USmarkolopa
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