This will help in these scenarios:
This is going to be the default (lowest common denominator), a new config file setting.
For advanced users, use:
session_save_handler = dbtable
(In ) fixes #2602, fixes #2574, refs #2548, refs #2597
reopening, as a reminder to create FAQ "How to deploy Piwik on multiple servers and enable database session storage?" or something similar
(In ) refs #2602 - always start the session for file-based sessions; for non-file-based sessions (e.g., dbtable), we assume there won't be an issue with too few mysql client connections
Thanks I have linked to it from the new FAQ: Does Piwik work in a load balanced environment? How do I setup Piwik for high scale tracking?