sum and average of requests responses times or sizes in Apache2 access log

egrep '.*(("STATUS)|("HEAD)).*' http_access.2012.07.18.log | awk '{sum+=$11; ++n} END {print "Tot="sum"("n")";print "Avg="sum/n}'
Depending on your Apache access log configuration you may have to change the sum+=$11 to previous or next awk token. Beware, usually in access log last token is time of response in microseconds, penultimate token is size of response in bytes. You may use this command line to calculate sum and average of responses sizes. You can also refine the egrep regexp to match specific HTTP requests.
Sample Output
Tot=134020202(15201)
Avg=8816.54

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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