Acquia: Troubleshooting Site Downtime

Below are some common performance-impacting issues that your environment(s) may be experiencing:

• Traffic: Increased traffic to your environment(s) may be causing service to be interrupted on those environments.
• Apache access logs: https://docs.acquia.com/acquia-cloud/monitor/logs/
• Insight: https://docs.acquia.com/acquia-cloud/insight/
• Stack Metrics: https://docs.acquia.com/acquia-cloud/monitor/stackmetrics/application/
• Out of memory issues: Check Stack Metrics for out of memory errors: https://docs.acquia.com/acquia-cloud/monitor/stackmetrics/
• Learn to find and resolve memory related errors: https://support.acquia.com/hc/en-us/articles/360005248674-Finding-Resolving-Memory-Related-PHP-errors-in-Acquia-Cloud
• Application issues - Did you deploy code recently? If so, try reverting code to a previous tag that works properly.
• Caching issues: Did you clear Varnish cache recently? Clearing Varnish cache can cause performance issues as the cache rebuilds. Consult caching overview documentation for more information and related links: https://support.acquia.com/hc/en-us/articles/360005212334-Caching-overview
• External calls: If your website is retrieving information from an external service, check to see that you have timeouts implemented in your application to prevent future downtime. Learn more about external calls: https://support.acquia.com/hc/en-us/articles/360004267413-Handling-external-website-calls