Why is my Moodle installation reporting memory issues?

If Moodle is pulling up white pages and is reporting memory issues, you will need to give Moodle more memory.

The first stage will be putting the following lines into your existing php.ini file in the root directory of your Moodle installation:

max_execution_time = 60
upload_max_filesize = 12M
post_max_size = 12M
memory_limit = 256M
display_errors = 0

Then you put the following lines into your .htaccess file in the root directory of your Moodle installation:

SetEnv DEFAULT_PHP_VERSION 5
php_value memory_limit 256M
php_value realpath_cache_size = 128K
php_value realpath_cache_ttl = 150
RLimitMem 256000000

If you do not have a php.ini or a .htaccess file in the root directory, you can create one in your text editor and upload it.

Try using Moodle after editing both of these files and if there is still a problem, increase the memory as needed.  Typically, you will not need a large amount of memory in your Moodle installation.