[HTRACE-280] htraced: add metrics about total spans added and dropped per address

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.1
• Fix Version/s: 4.1
• Component/s: htraced
• Target Version/s: 4.1
• Assignee: Colin McCabe
• Reporter: Colin McCabe
• Created: 14/Oct/15 00:27
• Updated: 23/Oct/15 02:49
• Resolved: 23/Oct/15 02:42

Description

htraced needs metrics about the total spans added and dropped per address. This will let us calibrate the sampling rate, and figure out what hosts are making the most use of tracing.