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MySQL Connection Pool — Live

In flight
Pool size
10
Warn threshold
Lifetime acquires
never

In-flight connections, by caller

Caller (file:function:line) Held now Lifetime acquires

Held-connection ages (oldest first)

Anything older than a few seconds is suspect — well-behaved callers acquire and release in milliseconds.

Caller (file:function:line) Age (seconds)
How to use:
Exercise the app, then watch this page.
A caller whose Held-connection count climbs and does not return to zero is leaking a connection.
Held-connection counts that climb and do not return to zero are leaking connections.
The backend logs a warning to app.log at 8 of 10 in-flight, naming the top holders.
Raw JSON is at /admin/db-pool-stats.