---
title: client.socket.tcpi_delivery_rate
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/variables/client-connection/client-socket-tcpi-delivery-rate
---

**Type:** INTEGER  
**Access:** read-only

**Available in:** recv, deliver, log, error

The recent effective delivery bandwidth of the connection towards the
client in bytes per second. This gives a reasonable estimate of
current connection performance by excluding periods when the connection was
idle due to lack of application data to send.

If the socket is limited by the sending application (e.g., no data to send),
the highest measurement is reported instead of the most recent.