Cygwin PHP Windows 10内存不足 [英] Cygwin PHP Windows 10 Out of memory
问题描述
4.5 GB的可用系统内存.阵列仅占用约4 MB. phpinfo()报告一个也是唯一的/etc/php.ini (没有Web服务器，没有托管环境，只有我的家用计算机)./etc/php.ini 具有 memory_limit = -1 . ini_get('memory_limit')按预期报告 -1 .最简单的动态数组分配方法，但是php会执行 exit(255)并报告内存不足".
4.5 GB of available system memory. Array only takes up ~4 MB. phpinfo() reports the one and only /etc/php.ini (no web servers, no hosted environment, just my home computer). /etc/php.ini has memory_limit=-1. ini_get('memory_limit') reports -1 as expected. Simplest possible dynamic array assignment, yet php does exit(255) and reports "Out of memory".
<?php
register_shutdown_function(function()
{
if($error = error_get_last())
{
var_dump($error);
var_dump(debug_backtrace());
passthru('free -m');
}
});
$count=1000000;
$bigArray=array();
echo "ini_get('memory_limit')=".ini_get('memory_limit')."\n";
for($i=0;$i<$count;++$i){
$bigArray[] = $i;
if(rand(0,10000)==0){
passthru('free -m');
echo 'php memory_get_usage='.memory_get_usage(true)."\n";sleep(1);
}
}
exit(0);
运行 php -f temp.php; echo"exit status = $?"; free -m;
ini_get('memory_limit')=-1
total used free shared buff/cache available
Mem: 8075 3507 4568 0 0 4568
Swap: 5931 329 5602
php memory_get_usage=2097152
total used free shared buff/cache available
Mem: 8075 3507 4567 0 0 4567
Swap: 5931 329 5602
php memory_get_usage=4259840
total used free shared buff/cache available
Mem: 8075 3507 4567 0 0 4567
Swap: 5931 329 5602
php memory_get_usage=4259840
total used free shared buff/cache available
Mem: 8075 3506 4569 0 0 4569
Swap: 5931 329 5602
php memory_get_usage=4259840
[...]
total used free shared buff/cache available
Mem: 8075 3505 4570 0 0 4570
Swap: 5931 329 5602
php memory_get_usage=4259840
PHP Fatal error: Out of memory (allocated 4259840) (tried to allocate 4194312 bytes) in /home/XYZ/temp.php on line 21
array(4) {
["type"]=>
int(1)
["message"]=>
string(67) "Out of memory (allocated 4259840) (tried to allocate 4194312 bytes)"
["file"]=>
string(19) "/home/XYZ/temp.php"
["line"]=>
int(21)
}
array(1) {
[0]=>
array(2) {
["function"]=>
string(9) "{closure}"
["args"]=>
array(0) {
}
}
}
total used free shared buff/cache available
Mem: 8075 3505 4570 0 0 4570
Swap: 5931 329 5602
exit status=255
total used free shared buff/cache available
Mem: 8075 3499 4576 0 0 4576
Swap: 5931 329 5602
Windows 10 cygwin x64
Windows 10 cygwin x64
$ uname -a
CYGWIN_NT-10.0 XYZ 3.1.5(0.340/5/3) 2020-06-01 08:59 x86_64 Cygwin
$ php -v
PHP 7.3.7 (cli) (built: Jul 21 2019 18:10:35) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.7, Copyright (c) 1998-2018 Zend Technologies
$ ulimit -v
unlimited
$ which php
/usr/bin/php
$ ls -l /usr/bin/php
-rwxr-xr-x 1 XYZ None 120339 Jul 21 2019 /usr/bin/php
$ peflags --cygwin-heap /usr/bin/php
/usr/bin/php: initial Cygwin heap size: 0 (0x0) MB
$ peflags --cygwin-heap=2048 /usr/bin/php
/usr/bin/php: initial Cygwin heap size: 2048 (0x800) MB
$ php -f temp.php
[... still a problem ...]
工作正常在x64 Windows 7 系统(仅具有 800MB 可用内存)上，并且具有相同的 memory_limit ，以及相同的php版本.
Works fine on a x64 Windows 7 system (with only 800MB available memory), with the same memory_limit, and same php version.
$ uname -a
CYGWIN_NT-6.1 XYZ 3.0.7(0.338/5/3) 2019-04-30 18:08 x86_64 Cygwin
$ php -v
[same as above]
with Zend OPcache v7.3.7, Copyright (c) 1999-2018, by Zend Technologies
$ ulimit -v
unlimited
$ which php
/usr/bin/php
$ ls -l /usr/bin/php
-rwx------+ 1 XYZ None 120339 Jul 21 2019 /usr/bin/php
$ peflags --cygwin-heap /usr/bin/php
/usr/bin/php: initial Cygwin heap size: 0 (0x0) MB
仅Cygwin
如果我卸载cygwin版本的php并使用预编译的非cygwin版本的php，则所有内容都可以在Windows 10上运行(找不到cygwin文件名(例如，"/usr")).
Only cygwin
if I uninstall the cygwin version of php and use a pre-compiled non-cygwin version of php, everything works on Windows 10 (except cygwin file names (e.g. "/usr") are not found).
推荐答案
再次尝试，现在可以使用了.
Tried again and now it works.
$ uname -a
CYGWIN_NT-10.0 XYZ 3.1.7(0.340/5/3) 2020-08-22 17:48 x86_64 Cygwin
$ php -v
PHP 7.3.7 (cli) (built: Jul 21 2020 18:15:38) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.7, Copyright (c) 1998-2018 Zend Technologies
$ ulimit -v
unlimited
$ which php
/usr/bin/php
$ ls -l /usr/bin/php
-rwxr-xr-x 1 XYZ None 121363 Jul 21 17:27 /usr/bin/php
$ peflags --cygwin-heap /usr/bin/php
/usr/bin/php: initial Cygwin heap size: 0 (0x0) MB
将在大约9个月内删除问题
will delete question in ~9 months
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