Problem: The client is experiencing slow performance in the backend of their webshop, particularly after installing WPML Multilingual CMS. They also face occasional 503 errors when updating plugins, including WPML. Solution: If you're experiencing similar issues, we recommend following these steps: 1. Increase the PHP memory limit to match the WP memory limit, as discrepancies can cause performance issues. For example, if your PHP memory limit is 256M, ensure your WP memory limit is also set to 256M. 2. Use a code profiler to identify if WPML or any other processes are resource-intensive. 3. Debug the performance issues using the guide provided by WPML here: https://wpml.org/faq/how-to-debug-performance-problems/ 4. If necessary, clone the site to a staging environment to perform further debugging without affecting the live site. Instructions on how to provide a copy of the site can be found here: https://wpml.org/faq/provide-supporters-copy-site/
Please note that this solution might be outdated or not applicable to your specific case. We highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If these steps do not resolve your issue, please open a new support ticket with us for further assistance.
