Any idea what would cause this? With memcached enabled I'm getting less requests/s and failed requests.

[burm]

Any idea what would cause this? With memcached enabled I'm getting less requests/s and failed requests.

Running: ab -n 100 -c 20

Memcached Enabled:

Document Path:		  /forums/

Document Length:		216040 bytes

Concurrency Level:	  20

Time taken for tests:   8.441 seconds

Complete requests:	  100

Failed requests:		76

   (Connect: 0, Receive: 0, Length: 76, Exceptions: 0)

Write errors:		   0

Total transferred:	  21655000 bytes

HTML transferred:	   21617300 bytes

Requests per second:	11.85 [#/sec] (mean)

Time per request:	   1688.222 [ms] (mean)

Time per request:	   84.411 [ms] (mean, across all concurrent requests)

Transfer rate:		  2505.29 [Kbytes/sec] received

Connection Times (ms)

			  min  mean[+/-sd] median   max

Connect:		0	0   0.7	  0	   2

Processing:   660 1597 364.7   1646	2303

Waiting:	  631 1547 353.8   1582	2231

Total:		662 1597 364.3   1646	2303

Percentage of the requests served within a certain time (ms)

  50%   1646

  66%   1806

  75%   1833

  80%   1881

  90%   2041

  95%   2173

  98%   2252

  99%   2303

100%   2303 (longest request)

Memcached off:

Document Path:		  /forums/

Document Length:	    216040 bytes

Concurrency Level:	  20

Time taken for tests:   7.839 seconds

Complete requests:	  100

Failed requests:	    0

Write errors:		   0

Total transferred:	  21641700 bytes

HTML transferred:	   21604000 bytes

Requests per second:    12.76 [#/sec] (mean)

Time per request:	   1567.849 [ms] (mean)

Time per request:	   78.392 [ms] (mean, across all concurrent requests)

Transfer rate:		  2695.98 [Kbytes/sec] received

Connection Times (ms)

			  min  mean[+/-sd] median   max

Connect:	    0    3   7.1	  0	  22

Processing:   599 1503 360.3   1526    2277

Waiting:	  584 1443 349.7   1478    2201

Total:	    599 1506 359.9   1531    2277

Percentage of the requests served within a certain time (ms)

  50%   1531

  66%   1690

  75%   1739

  80%   1765

  90%   1963

  95%   2073

  98%   2180

  99%   2277

100%   2277 (longest request)