What is processingTime unit, millisecond? Is that the sum of all requests
processed? And, to get the average, I divide that by requestCount?
Rainer Jung-3 wrote:
>
>> So, I looked at JMX Console and see that under RequestProcessor for
>> Catalina
>> it shows all the HTTP request processor thr
So, I looked at JMX Console and see that under RequestProcessor for Catalina
it shows all the HTTP request processor threads. And, for each, it shows an
attribute called "requestProcessingTime" which I think is the time it took
to process that request. So, I was thinking to write a script to que
Yup. DB will always be a bottleneck in any application, so we load balance
it for optimum performance. So, we can "forget" the DB bottleneck since we
add another DB if it starts hitting our threshold. So, the first test i did
was to find out the DB performance and its maximum values. That is c
> From: wicket0123 [mailto:[EMAIL PROTECTED]
> [W]e want every request to be processed within 25
> millisecods.
[...]
> 2. Ad server process the request which include app. code and
> talking to DB
Your database communication, queries and data will have to be very, very
heavily optimised if you wa
L PROTECTED]>
To:
Sent: Friday, March 28, 2008 4:44 PM
Subject: Re: Checking tomcat metrics in a non-intrusive way
>
> First, thank you all for the responses. They are all good.
>
> Rainer, I'm actually doing something similar to what you suggested. I
wrote
> a script t
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Wicket,
wicket0123 wrote:
| Since we cannot control anything that happens after a request leaves the
| server, we want every request to be processed within 25 millisecods. The
| order of execution is very simple:
|
| 1. Client send ad request with s
First, thank you all for the responses. They are all good.
Rainer, I'm actually doing something similar to what you suggested. I wrote
a script that queries the server using JMX proxy for the metrics I want. I
do this every second. My concern is that it is too intrusive since i'm
doing it eve
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Peter,
Peter Crowther wrote:
|> If I ping www.google.com from my home computer, I get a 14.593ms
|> average roundtrip time.
|
| Lucky you. It's rare I see under 200.
Google must have a shipping container full of servers somewhere in my
neighborhood
> From: Christopher Schultz [mailto:[EMAIL PROTECTED]
> wicket0123 wrote:
> | JMeter reports that for 500 concurrent users making request to our
> | application, the average response time was 1 second. That already
> | broke our SLA which is 15 milliseconds.
I presume you've already done such obv
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Wicket,
wicket0123 wrote:
| If the container adds a lot of overhead, we may want to
| switch to other containers.
The only container I know that people claim to have less overhead is
Jetty. You will have the same problem instrumenting /that/ as well
wicket0123 schrieb:
I want to check tomcat response time for requests when I run, say 500
concurrent users, on the server. I use the default setttings for tomcat
which means my maxThreads = 40.
I have read from some articles suggesting to use JMX Console to monitor
tomcat. But, then i read fro
In the real world what network connections will exist between you and
your real clients?
How many ports do you have on your server?
How fast are they?
How big are the pages being requested? Including images, css files etc?
If you have 500 concurrent users will you have 500 times the traffic
It matters to us because we are talking about response time of under 10ms for
500 concurrent users. Our internal application metrics are in the
nano-seconds. If the container adds a lot of overhead, we may want to
switch to other containers.
For scalability testing, our testing is done in a clo
> From: Christopher Schultz [mailto:[EMAIL PROTECTED]
> Subject: Re: Checking tomcat metrics in a non-intrusive way
>
> Rest assured that reading the system clock is /very/ fast. ;)
Well... not always, these days. On multi-socket systems, if the system
architecture guarantees tha
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Wicket,
wicket0123 wrote:
| Hi Charles,
| Thanks for the reply. JMeter doesn't help me here because the
response
| time includes network time. The reason I'm looking into the tomcat API is
| because i want a way to query tomcat for the numbers
> From: wicket0123 [mailto:[EMAIL PROTECTED]
> Subject: RE: Checking tomcat metrics in a non-intrusive way
>
> JMeter doesn't help me here because the response
> time includes network time.
Which is exactly why I suggested running JMeter on the same LAN segment,
if not t
Hi Charles,
Thanks for the reply. JMeter doesn't help me here because the response
time includes network time. The reason I'm looking into the tomcat API is
because i want a way to query tomcat for the numbers. So, the metrics I am
after are:
1) How much time was spend in tomcat? no netwo
> From: wicket0123 [mailto:[EMAIL PROTECTED]
> Subject: Checking tomcat metrics in a non-intrusive way
>
> I want to check tomcat response time for requests when I run,
> say 500 concurrent users, on the server.
Any measurements made within Tomcat itself are going to have some effect
on performa
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