# LibTmux::ControlConnection#diagnostics

- **Module:** LibTmux::ControlConnection#
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/c6d9d21771828e583692ca899ed817f9640d6a55/gems/libtmux/lib/libtmux/control.rb#L552
- **Page:** https://libtmux.org/en/ruby/latest/reference/libtmux-controlconnection-diagnostics/

```
LibTmux::ControlConnection#diagnostics() -> { admitted_requests: ::Integer, incomplete_requests: ::Integer, queued_requests: ::Integer, writing_requests: ::Integer, awaiting_reply: ::Integer, reserved_wire_bytes: ::Integer, retained_reply_bytes: ::Integer, stderr_received_bytes: ::Integer, subscription_count: ::Integer, stopping: bool, finished: bool, cleanup_error_count: ::Integer, limits: { max_requests: ::Integer, max_command_bytes: ::Integer, max_queue_bytes: ::Integer, max_line_bytes: ::Integer, max_reply_bytes: ::Integer, max_stderr_bytes: ::Integer, max_subscriptions: ::Integer } }
```

Returns frozen local accounting, without payloads or native liveness I/O.
Admission and byte reservations include completed replies until consumed.
Subscription count includes closed streams retained by this connection.

Behavior contract: Diagnostics.