It is important, once the database merging is done, to set again the corresponding value of ''memory_limit'' in file configuration ''php.ini''. Remember that for the change to take effect, the apache ''httpd'' service must be restarted.
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Once the database merge is finished, the ''php.ini'' file values must be returned to their normal values, especially ''memory_limit'' to its previous value. **It is important** that whenever the ''php.ini'' file parameters are modified, the Apache ''httpd'' service and the PHP ''php-fpm'' service are **restarted** for the changes to take effect.