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The columns are:

  • Srv
  • PID
  • Acc
  • M
  • CPU
  • SS
  • Req
  • Conn
  • Child
  • Slot
  • Client
  • VHost
  • Request
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up vote 5 down vote accepted

Apache itself explains what these fields are when queried. From this tutorial:

Srv Child Server number - generation
PID OS process ID
Acc Number of accesses this connection / this child / this slot
M Mode of operation
CPU CPU usage, number of seconds
SS Seconds since beginning of most recent request
Req Milliseconds required to process most recent request
Conn Kilobytes transferred this connection
Child Megabytes transferred this child
Slot Total megabytes transferred this slot

The Client, Vhost and Request are the columns that are of the most use. Client is the IP of the person accessing the resource. VHost is the domain or subdomain being accessed. Request is the actual file on the site that is being accessed.

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