~> siege -c 5 -b -t30s http://drupal/
**SIEGE 2.67
**Preparing 5 concurrent users for battle.
The server is now under siege...
Lifting the server siege...      done.
Transactions:		         252 hits
Availability:		      100.00 %
Elapsed time:		       29.73 secs
Data transferred:	        0.60 MB
Response time:		        0.57 secs
Transaction rate:	        8.48 trans/sec
Throughput:		        0.02 MB/sec
Concurrency:		        4.87
Successful transactions:         252
Failed transactions:	           0
Longest transaction:	        2.90
Shortest transaction:	        0.11