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Tomcat, if you are running Tomcat and the database on the same server (see https://phixflow.atlassian.net/wiki/pages/resumedraft.action?draftId=8643674113 Tomcat Planning for Tomcat’s memory requirements)
A reverse proxy, if you are also running this on the same server; although in general these will have a minor footprint across all resources (CPU, memory, storage) for most PhixFlow instances
Anti-virus, and other security and monitoring software; see note on Install MySQL to make sure that any anti-virus software does not interfere with MySQL
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