PHPCassa | Load Test

[waqas....@northbaysolutions.net]

Hi,

I am new with Cassandra. I am just analyzing the web page response time using jMeter after including PHPCassa library in the page. 

 

Following are the configurations of jMeter's thread group

Number of Threads: 500

Ramp-Up  Period: 1 second

Loop Count: 1

After executing the above test case, average response time is 7 seconds and If we do not include the PHPCassa library then average response time of the page is 5 mili seconds.

 

I am little confused that why the response time is being increased by just including the library without any initialization?

 

Kindly help in this regard.

[waqas....@northbaysolutions.net]

Hi All,

I have figure out the root cause of slow response. It is because of a lot of disk I/O operations per request. As Cassandra uses thrift, PHP server takes time to interpret all files of thrift on each request.

 

To resolve the problem of slow response, I have configured Alternative PHP Cache (APC) to cache the interpreted form of code. After using APC results are excellent. Following is the little summary

 
Apache's jMeter Test Case:
Number of Threads: 1000

Ramp-Up  Period: 1 second
Loop Count: 1

 

Results:

Minimum Response Time: 2 mili seconds

Maximum Response Time: 1.8 seconds 

Average Response Time:  32 mili seconds

Thanks for your time.