RE: performance

[Randy Layman <ra...@aswethink.com>]

	Light load?  It looks to me that you are sending
	1ms * 1000 ms/s * 20 threads = 20,000 requests per second to the
server.  This would translate to 20K request/second * 60 seconds/min * 60
minutes/hour = 72,000,000 request per hour.  Maybe I'm not understanding the
numbers you quote (I'm not familary with JMeter), but I would be suprised if
any non-clustered web server running on Intel hardware could handle 72
million hits per hour.

	(Although I would also be suprised if a Microsoft operating system
could count to 72 million ;) )

	Randy

-----Original Message-----
From: RBinion@lavastorm.com [mailto:RBinion@lavastorm.com]
Sent: Thursday, February 01, 2001 4:12 PM
To: tomcat-user@jakarta.apache.org
Subject: performance


Hi,

I know that Tomcat does not claim to strive for the performance
characteristics of other servlet containers, such as resin. However, I am
wondering just how bad the performance is. I have run some tests, and I have
been a bit surprised.

Test environment is a 4 proc NT server with 1 gig of memory. I am using
tomcat 3.2.1 running standalone, and have set the max heap size for the JVM
to be about half of physical memory, also I have the server hotspot jit
installed.. Additionally I am using Jmeter to apply some load. 

With 1 Jmeter client configured with a standard delay of 1 ms and 20
threads, the website being hit becomes essentially non-responsive. Using the
same configuration, but substituting resin for tomcat, shows no noticeable
degradation in performance.

Again, I am not surprised that resin performs better, but I am surprised
that Tomcat is that much slower, with even a light load applied. 

Are these performance characteristics to be expected. Does these results
surprise anyone. 

Any feedback would be appreciated, and thanks in advance.

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RE: performance

[Kevin Sangeelee <ke...@susa.net>]

On Thu, 1 Feb 2001, Randy Layman wrote:

> 	(Although I would also be suprised if a Microsoft operating system
> could count to 72 million ;) )

In fact, it can - this is precisely the number of NO-OP instructions it
executes while 'Writing unsaved data to disk'.

Sorry folks! I couldn't resist :)