[Webdev] Apache AB and Zend Cache

[Anton McKee]

Howdy everyone.

Just some interesting results I have from running ab on two of my sites.

Site one has feck all dbase lookups. I havew also installed the zend cache 
($1899+ for those who want to know) and it looks pretty cool

However site one as I said has not dbase lookups but the file extension is 
.php as I may need to add stuff in the future. so running ab I get

Document Path:          /
Document Length:        23486 bytes

Concurrency Level:      1
Time taken for tests:   5.939 seconds
Complete requests:      1000
Failed requests:        484
   (Connect: 0, Length: 484, Exceptions: 0)
Total transferred:      23824013 bytes
HTML transferred:       23487128 bytes
Requests per second:    168.38
Transfer rate:          4011.45 kb/s received

Connnection Times (ms)
              min   avg   max
Connect:        0     0     2
Processing:     4     5   112
Total:          4     5   114

Which is worrying me a little. The failed request is quite high.

However on the ssecond web site on the same server when I run the ab test 
against a page that pulls and image from a database and other infor I get the 
following.

Document Path:          /other/who/index.phtml?empid=6
Document Length:        28562 bytes

Concurrency Level:      1
Time taken for tests:   9.289 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      28898889 bytes
HTML transferred:       28562000 bytes
Requests per second:    107.65
Transfer rate:          3111.09 kb/s received

Connnection Times (ms)
              min   avg   max
Connect:        0     0     8
Processing:     8     8    86
Total:          8     8    94

BIG DIFFERENCE. Seeminly it don't like just plain old php stuff. ab was run 
with ab -n 1000 url from another box on the network.

Why are the failed request so high on one site and not on the other. (max 
server etc all been setup an optimised for our set up)? It really is 
worrying. 

On a side note. If you can afford it especially for anyone that runns a busy 
phorum setup zend cache rocks. it's really cool and easy to setup.

Later
Aj


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