VirtualAlloc() failed: [0x00000008] Not enough storage is available to process this command


I have been facing this error quite a long time, My production environment is running Apache 2.4 and php7 on a windows 2008 R2 enterprise platform.

My error log is full of these lines VirtualAlloc() failed: [0x00000008] Not enough storage is available to process this command. VirtualFree() failed: [0x000001e7] Attempt to access invalid address

After some time it leads to a 500 error, and later I have to restart the server it works fine only for some time.

Please help me in resolving these issues I have tried to update the memory from php and wordpress end but still no help

asked on Stack Overflow Jun 12, 2017 by manjoo • edited Dec 21, 2018 by p u

4 Answers


Your project may not be setup on the appropriate architecture.

Is your PHP 32 bit? Check the PHP_INT_SIZE constant to find out.

print_r(PHP_INT_SIZE); # 4 == 32bit // 8 == 64bit

Windows Server 2008 R2 is an x64 operating system, so an x86 version of Apache +/- x86 PHP could be capping the memory you may have installed on your machine and are trying to allocate. You won't be able to allocate more than 2G on on x86 version.

answered on Stack Overflow Mar 26, 2019 by Jacob Cruz • edited Mar 26, 2019 by Jacob Cruz

I was getting this error if I do

composer update

It worked for me when I tried

composer install
answered on Stack Overflow Aug 8, 2019 by harbrinder_singh

I was facing the same error and this command fixed issue for me on localhost

php -d memory_limit=-1 "C:/ProgramData/ComposerSetup/bin/composer.phar"

then do composer update

answered on Stack Overflow Jul 6, 2020 by Abid_015

Just Update latest version of composer

otherwise do below steps

This setting only in Local machine(commands)

To Check PHP Memory

php -r "echo ini_get('memory_limit');"



To Know PHP path

php --ini


Configuration File (php.ini) Path: C:\Windows
Loaded Configuration File:         C:\xampp72\php\php.ini
Scan for additional .ini files in: (none)    
Additional .ini files parsed:      (none)

Just Update your memory limit

; Maximum amount of memory a script may consume (128MB)

For Unlimit memory Access


or simply run for windows

php -d memory_limit=-1 "C:\ProgramData\ComposerSetup\bin\composer.phar" update

Note: I recommend must download latest composer version

composer -v

answered on Stack Overflow Mar 9, 2021 by ßãlãjî • edited Mar 10, 2021 by ßãlãjî

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