edit: One thing to note is both of these tests are testing wordpress more than anything. I’ve since run tests just using <?php echo phpinfo(); ?> which did 24 million page views with 0 failures.
I set siege up last night to run for 6 hours although it appears that it was shutdown after 19 mins. I suspect its my own poor configuration of Siege that caused the problem but it still had some interesting stats. I pumped up the concurrency to 280 which I think is about the limit for my Siege box due to memory issues.
Here is the report…
Transactions: 105786 hits
Availability: 99.03 %
Elapsed time: 1165.26 secs
Data transferred: 223.68 MB
Response time: 2.55 secs
Transaction rate: 90.78 trans/sec
Throughput: 0.19 MB/sec
Successful transactions: 106299
Failed transactions: 1031
Longest transaction: 26.49
Shortest transaction: 0.35
Unfortunately at this level I’m getting a full 1% of failures however this is pushing the hardware to 7.6 million page views per day.
One thing to note is that my setup is currently “out of the box”, I haven’t used any special configuration or caching (outside of APC). When I get a chance I’ll configure Nginx properly and do some more testing.