Often when setting up Magento 2 you’ll hit a memory size limit, and the error ‘Allowed memory size exhausted‘ where your local machine or hosting can’t provide sufficient memory for a script to run. This commonly occurs when trying to run large scripts, such as;
- running migration tools
- installing large modules
- installing Magento
- compiling the project
- deploying static content
PHP Fatal error: Allowed memory size of xxx bytes exhausted
Magento 2 has memory limits defined in the root .htaccess file. These should be sufficient in production, but may cause issues when running large installation scripts when developing your site.
############################################
## adjust memory limit
php_value memory_limit 768M
php_value max_execution_time 18000
Allowed memory size exhausted – Solutions
Increase the memory limit in your .htaccess file
Try temporarily modifying the limits as shown above, to see if that solves your issue.
############################################
## adjust memory limit
php_value memory_limit 1G
php_value max_execution_time 36000
Increase the memory limit in your .php.ini file
If you have access to your php.ini file or can create one in the root, you can globally increase your allocated memory.
;adjust memory limit memory_limit = 1G max_execution_time = 36000 max_input_time = 36000
Use Composer locally
I often hit memory limits when trying to add large migration scripts to the project requirements, so I could import data from a Magento 1 website.
e.g.
php composer.phar update magento/data-migration-tool
To resolve this I ran the command in my local setup. This then added a reference to the new module to the composer.lock file. I could then copy this file up to my hosting account and run it there, using;
#update from lock file php composer.phar install
The /vendor files for the migration tool where then downloaded from the repository without any further errors.
Let me know if this post helped you to run your Magento installation successfully, in the comments. For WordPress memory limit solutions, please refer to this post.
