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Date: Mon, 13 Sep 2004 14:29:18 -0500
From: Peter Lin <woolfel@gmail.com>
Reply-To: Peter Lin <woolfel@gmail.com>
To: JMeter Users List <jmeter-user@jakarta.apache.org>
Subject: Re: Large File Size
In-Reply-To: <D31DF3C890E65C46B568B9A15A84657D199DD3@HQ-EXVS03.anteon.com>
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References: <D31DF3C890E65C46B568B9A15A84657D199DD3@HQ-EXVS03.anteon.com>

I just double checked and it looks like JMeter gets a BufferedStream
and doesn't load the file. The PostWriter calls InputStream
getFileStream(String filename) to get the stream and write directly to
the output stream.

so my previous email was wrong. it could just be that opening more
than 3 threads on the same file is very intensive

peter


On Mon, 13 Sep 2004 14:18:54 -0400, Martinez de Pinillos, Joaquin
<jmartinezdepinillos@anteon.com> wrote:
> Peter,
> 
>  Thanks my problem is I am trying to test for 100 concurrent users with
> large file size.  I am looking at options but I was hoping someone could
> provide me a better explanation as to why JMeter is bombing out.  Thanks
> again.
> 
> Joaquin J. Martinez de Pinillos
> Anteon Corporation
> (o) 703 253 3425
> (f)  703 253 3690
> (m) 703 980 8827
> 
> 
> -----Original Message-----
> From: Peter Lin [mailto:woolfel@gmail.com]
> Sent: Monday, September 13, 2004 2:06 PM
> To: JMeter Users List
> Subject: Re: Large File Size
> 
> wow, that is a huge file.  I've had test plans that were 10mb+ in the
> past, but I've never had a test plan that attached a 25mb file.  Even
> if JMeter could handle 10 threads within a single instance, anything
> more than 2 concurrent threads is going to seriously slow down the
> network I/O.
> 
> in this particular case, I'm gonna say the best option is to use
> several client machines to test and only use 2-3 threads per jmeter
> instance. depending on the network, 25mb file is gonna takes a minute
> or longer.
> 
> I hope that helps
> 
> peter
> 
> On Mon, 13 Sep 2004 13:59:55 -0400, Martinez de Pinillos, Joaquin
> <jmartinezdepinillos@anteon.com> wrote:
> >   I am new to JMeter but I think I have a problem which I have seen a
> > couple of posts on but no resolution.  I am running JMeter and I am
> > trying to run multiple threads.  In my web page I am attaching files.
> >
> > If I use small file sizes say 1 to 2 MB everything runs fine.  I can
> run
> > multiple threads no problems.  However when I try and attach a large
> > file say 25 MB JMeter can only handle 2 maybe 3 threads.  I have
> looked
> > at my memory settings and they are set to 256 MB.  My PC has 512 MB.
> I
> > think this is a memory issue but I am not sure how to solve it.  Any
> > help would be greatly appreciated.  Thanks in advance.
> >
> > Joaquin J. Martinez de Pinillos
> >
> > Anteon Corporation
> >
> > (o) 703 253 3425
> >
> > (f)  703 253 3690
> >
> > (m) 703 980 8827
> >
> >
> 
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