The SiteNow cloud hosting provider Acquia will be performing unscheduled security maintenance to address several critical security vulnerabilities.
Load balancers will receive a reboot during this maintenance. This process is expected to complete in under 10 minutes. Varnish will continue to serve cached traffic during most of the update process. High volume applications with heavy reliance on Varnish and Memcache caching may experience temporary performance degradation while the cache rebuilds immediately after the update.