Re: Connections problem while testing web application

[sebb <se...@gmail.com>]

Ramp up is described here:

http://jakarta.apache.org/jmeter/usermanual/component_reference.html#Thread_Group

You're probably trying to start the threads too quickly.

Setting ramp-up to the same as number of threads is a good starting
point; you may be able to reduce it later.

S.
On 6/21/05, srikanth peddireddy <sr...@yahoo.co.in> wrote:
> Hi All,
> 
>     I am trying to do a load test kind of thing on my web application.
> I have a test plan containing a sequence of HTTP requests  (say Req1,Req3, Req3 ).
> In Req2 and 3 " lot of other web pages are embedded(in frame sets , as images etc). Retrieve All Embedded Resources from HTML Files "  is selected for them
> 
> 
>  Then I ran the test with following settings
> 
>  Number of threads   20
>  Ramp-up period as 0
> Loop count    1
> 
> and then i incresed  Threads to 30 and Ramp-up to 1 second
> 
> Test ran succesfully in both cases.
> But when i incresed threds to 40 (keeping ramp up at 1 second ) following error is shown for many requests in response data
> 
> Java.net.SocketException: No buffer space available (maximum connections reached?): connect
>  at java.net.PlainSocketImpl.socketConnect(Native Method)
>  at java.net.PlainSocketImpl.doConnect(Unknown Source)
>  at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
>  at java.net.PlainSocketImpl.connect(Unknown Source)
>  at java.net.Socket.connect(Unknown Source)
>  at java.net.Socket.connect(Unknown Source)
>  at sun.net.NetworkClient.doConnect(Unknown Source)
>  at sun.net.www.http.HttpClient.openServer(Unknown Source)
>  at sun.net.www.http.HttpClient.openServer(Unknown Source)
>  at sun.net.www.http.HttpClient.<init>(Unknown Source)
>  at sun.net.www.http.HttpClient.<init>(Unknown Source)
>  at sun.net.www.http.HttpClient.New(Unknown Source)
>  at sun.net.www.http.HttpClient.New(Unknown Source)
>  at sun.net.www.http.HttpClient.New(Unknown Source)
>  at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
>  at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
>  at org.apache.jmeter.protocol.http.sampler.HTTPSampler.sample(HTTPSampler.java:464)
>  at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:590)
>  at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:578)
>  at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:281)
>  at java.lang.Thread.run(Unknown Source)
> 
> 
> I am running a Win 98 system with 128 MB RAM. Is this configuration has something to do with the error.
> If not some one kindly expalin me the reasons behind this. What actually Romp-up is and what would be the ideal value to set for it.
> Any help will be very much appreciated.
> 
> Regards
> Srikanth.P
> 
> 
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