[TS-3411] Add stat to track total number of network connections

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Fix Version/s: 7.0.0
• Component/s: Network, Performance
• Assignee: Susan Hinrichs
• Reporter: Susan Hinrichs
• Created: 25/Feb/15 22:24
• Updated: 16/Aug/16 22:05
• Resolved: 16/Aug/16 22:05

Description

Currently, we can use proxy.process.http.total_client_connections or proxy.process.http.total_incoming_connections to determine the number of TCP connections that have been made from the user_agent to ATS, assuming that HTTP/1.0 or HTTP/1.1 are used.

If SPDY or HTTP/2 are used, these counters will be incremented for each stream not for each network connection.

It would be useful to add counters in the iocore/net area to directly track the number of TCP connections that have been open over time. Right now only the number of currently_open connections are tracked via proxy.process.net.connections_currently_open.

I propose adding two new metrics proxy.process.net.connections_successful_in and proxy.process.net.connections_successful_out