Re: TLD scanning performance question

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Markus, On 10/25/17 10:53 AM, i...@flyingfischer.ch wrote: > >> >> Yes, it's the SecureRandom initialization that is killing you. >> Being a virtual server, it likely has no direct source of true >> randomness so it needs to pull from whatever

Re: TLD scanning performance question

And haveged works GREAT! Thanks Markus. On Wednesday, October 25, 2017 10:53 AM, "i...@flyingfischer.ch" wrote: > > Yes, it's the SecureRandom initialization that is killing you. Being a > virtual server, it likely has no direct source of true randomness so >

Re: TLD scanning performance question

> > Yes, it's the SecureRandom initialization that is killing you. Being a > virtual server, it likely has no direct source of true randomness so > it needs to pull from whatever the hypervisor is willing to provide. > > You'll need to ask your virtualization vendor for how to get access to >

Re: TLD scanning performance question

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Ray, On 10/25/17 9:08 AM, Ray Holme wrote: > I asked this question before (differently) and got some answers but > now I think I understand what is really happening. I just want to > confirm that I have finally understood what is happening. Given

TLD scanning performance question

I asked this question before (differently) and got some answers but now I think I understand what is really happening. I just want to confirm that I have finally understood what is happening. Given two Linux boxes running the same application, one is much slower starting  (think that  "slower"

Re: Performance question...

:19 AM Subject: RE: Performance question... Could you please share the reference/link to spring framework fix as only code cache increase didn't help? Regards, Vishal -Original Message- From: PerfGuru [mailto:myunipor...@yahoo.com.INVALID] Sent: Monday, April 13, 2015 5:23 PM

RE: Performance question...

: Performance question... Sorry Jeff my Tocat emails are bouncing from the email address use so using another one that works. Last Friday the development team tried the spring framework fix  sugested and it fixed the problem of higher than normal cpu and performance. We did try the other idea

Re: Performance question...

question... -Original Message- From: PerfGuru [mailto:myunipor...@yahoo.com.INVALID] Sent: Thursday, April 09, 2015 10:17 AM To: Tomcat Users List Subject: Re: Performance question... Looks like we have two potential root causes. 1. Spring Framework 4.0.0 and jdk 1.7.0_51 are used

Re: Performance question...

To: PerfGuru myunipor...@yahoo.com; users users@tomcat.apache.org Sent: Tuesday, April 7, 2015 5:55 PM Subject: Re: Performance question... Hello Try to do a java thread dump and check the stuck threads (possibly by comparing with the output of the tomcat server status page). Hopefully

Re: Performance question...

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Tony, On 4/7/15 12:54 PM, PerfGuru wrote: Hi All,We are noticing when running a simple load test of 25 virtual users that our Tomcat server is running at 40% CPU and transactions are taking over 40 seconds. We setup a test where we focused (in

Performance question...

Hi All,We are noticing when running a simple load test of 25 virtual users that our Tomcat server is running at 40% CPU and transactions are taking over 40 seconds. We setup a test where we focused (in a loop) one of the longer response time requests. The access logs show the log response time

Re: Performance question...

Hello Try to do a java thread dump and check the stuck threads (possibly by comparing with the output of the tomcat server status page). Hopefully this will give you a clue about what the threads are doing at that time. If the application uses a database, you may see that they are stuck waiting

Re: Tomcat Linux/Windows Performance Question

Ashkan Rahmani wrote: ... Application is under heavy developing, app has some page ( I call it page, I don't know java or serverlet) with very high latency occurs for now, some times we got out of memory error message. This is test server with windows 2003 x86 and tomcat 6.x. Chief developer

Re: Tomcat Linux/Windows Performance Question

Thank you, This is very completed answer and I found it really useful, and hopeful! Application is under heavy developing, app has some page ( I call it page, I don't know java or serverlet) with very high latency occurs for now, some times we got out of memory error message. This is test

[OT] Re: Tomcat Linux/Windows Performance Question

Hi Christopher, -Original-Nachricht- Von: Christopher Schultz ch...@christopherschultz.net Datum: Mon, 29 Oct 2012 03:52:36 +0100 Personally, I prefer Linux based upon its friendliness to developers and administrators: it's got the tools we need and it's easy to build additional

Re: [OT] Re: Tomcat Linux/Windows Performance Question

On 10/29/2012 03:16 PM, verlag.preis...@t-online.de wrote: 3. Bizarre observations when using high-resolution (or even ms-res) clocks and timers... seems like you can't get more than about 0.1-sec resolution or so reliably -- or at least plausibly -- on a win32 box. Hmm, I think this applies

Re: [OT] Re: Tomcat Linux/Windows Performance Question

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Konstantin, On 10/29/12 3:16 PM, verlag.preis...@t-online.de wrote: Hi Christopher, -Original-Nachricht- Von: Christopher Schultz ch...@christopherschultz.net Datum: Mon, 29 Oct 2012 03:52:36 +0100 Personally, I prefer Linux based

Re: Tomcat Linux/Windows Performance Question

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Pid, On 10/29/12 2:45 PM, Pid wrote: Thank you, This is very completed answer and I found it really useful, and hopeful! Application is under heavy developing, app has some page ( I call it page, I don't know java or serverlet) with very high

Re: Tomcat Linux/Windows Performance Question

Ashkan Rahmani wrote: Hi, Now I have a windows 2003 server and a Tomcat 6.x on it. Our application has many many parts and it's very big. Actually we are not happy with tomcat performance, (We are working very hard on developing that software and improving performance) . We want to improve

Re: Tomcat Linux/Windows Performance Question

On 28 Oct 2012, at 11:39, Ashkan Rahmani ashkan...@gmail.com wrote: Hi, Now I have a windows 2003 server and a Tomcat 6.x on it. Our application has many many parts and it's very big. Actually we are not happy with tomcat performance, (We are working very hard on developing that software

Re: Tomcat Linux/Windows Performance Question

André Warnier wrote: Ashkan Rahmani wrote: Hi, Now I have a windows 2003 server and a Tomcat 6.x on it. Our application has many many parts and it's very big. Actually we are not happy with tomcat performance, (We are working very hard on developing that software and improving performance) .

Re: Tomcat Linux/Windows Performance Question

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Pid, On 10/28/12 10:40 AM, Pid * wrote: On 28 Oct 2012, at 11:39, Ashkan Rahmani ashkan...@gmail.com wrote: Hi, Now I have a windows 2003 server and a Tomcat 6.x on it. Our application has many many parts and it's very big. Actually we are

Re: Tomcat Linux/Windows Performance Question

On Sun, Oct 28, 2012 at 7:10 PM, André Warnier a...@ice-sa.com wrote: André Warnier wrote: Ashkan Rahmani wrote: Hi, Now I have a windows 2003 server and a Tomcat 6.x on it. Our application has many many parts and it's very big. Actually we are not happy with tomcat performance, (We are

Re: Tomcat Linux/Windows Performance Question

On Mon, Oct 29, 2012 at 6:22 AM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Pid, On 10/28/12 10:40 AM, Pid * wrote: On 28 Oct 2012, at 11:39, Ashkan Rahmani ashkan...@gmail.com wrote: Hi, Now I have a windows 2003 server

Re: Tomcat Performance Question

Hello Ali, please find included below a link URL that addresses the JSF performance issue. A much more rigorous test would be to use the JMeter distributed testing using the JMeter server. HTH, David. Ali Ok wrote .. Hi, We are building a web application with JSF. Last day I tested it with

Re: Tomcat Performance Question

Thanks David, I mean, if I make 3 requests in a very short time (about 10 seconds); Tomcat does not respond. I read books, tutorials, faqs and threads at maling list about Tomcat tuning. But I couldnt find an example server.xml file used in production or real test results. So I cant

Re: Tomcat Performance Question

30,000 requests in 10 seconds probably isn't normal traffic, but it could represent a sudden spike. think of it another way, that's 3,000 requests per second. If we calculate that for a 10 hour period, it puts things in perspective 1000 req/sec * 60 sec/min = 60,000 req/min 60,000 req/min * 60

Re: Tomcat Performance Question

Hello Ali, there are no absolute benchmarks for what you are looking for. The central theme to any performance questions invariably lead to the A word (Architecture). You need to evaluate you overall architecture from a high level perspective. With this said the questions then are: * What is

Re: Tomcat Performance Question

Peter, thats ok, maybe some day we can get that much hit :) What if someone make so much requests and confuse the server? Does Tomcat have an prevention for this situation? Or is it beyond the scope? David, I have already read all of resources you sent. Invariably performance issues are rarely

RE: Tomcat Performance Question

From: Ali Ok [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat Performance Question What if someone make so much requests and confuse the server? Does Tomcat have an prevention for this situation? You can configure the maximum number of requests a Connector will handle concurrently, as well

Re: Tomcat Performance Question

have you tried monitoring the CPU and IO usage of the system during the test? In the past, when I stress test an application, I monitor the cpu and io, to determine which part is getting maxed out first. For example, if I was serving up static pages, the first thing to mak out is the IO, so even

Re: Tomcat Performance Question

Ali Ok wrote: Thanks David, I mean, if I make 3 requests in a very short time (about 10 seconds); Tomcat does not respond. I read books, tutorials, faqs and threads at maling list about Tomcat tuning. But I couldnt find an example server.xml file used in production or real test results. So

Re: Tomcat Performance Question

:18 PM Subject: Re: Tomcat Performance Question Ali Ok wrote: Thanks David, I mean, if I make 3 requests in a very short time (about 10 seconds); Tomcat does not respond. I read books, tutorials, faqs and threads at maling list about Tomcat tuning. But I couldnt find an example

Re: performance question

to possibly the database (Oracle) I'm using? can you tell me more about performance monitoring log files? Regards, Frank -- View this message in context: http://www.nabble.com/performance-question-tf2090969.html#a6713234 Sent from the Tomcat - User mailing list archive at Nabble.com

Re: performance question

monitoring log files? Regards, Frank -- View this message in context: http://www.nabble.com/performance-question-tf2090969.html#a6713234 Sent from the Tomcat - User mailing list archive at Nabble.com. - To start a new topic, e-mail

Re: performance question

Lambda Probe is a free+easy way to get some instrumentation Propes, Barry L wrote: I'm having some problems this morning with performance. How can I easily determine if it's servlets, or Tomcat, as opposed to possibly the database (Oracle) I'm using? I've not had this problem before. Barry

Re: performance question

hmm check your probably not existing performance monitoring log files? :-) Leon On 8/11/06, Propes, Barry L [EMAIL PROTECTED] wrote: I'm having some problems this morning with performance. How can I easily determine if it's servlets, or Tomcat, as opposed to possibly the database (Oracle)

performance question

I'm having some problems this morning with performance. How can I easily determine if it's servlets, or Tomcat, as opposed to possibly the database (Oracle) I'm using? I've not had this problem before. Barry

Re: Code performance question #2

David Kerber wrote: Pid wrote: here's another obvious question: if you're in a servlet, and you're getting an separated string from somewhere, where is the somewhere that you're getting it from? does the servlet activate and collection the data somehow, or does the data get sent to the

RE: Code performance question #2

From: David Kerber [mailto:[EMAIL PROTECTED] Do you think it be more efficient to scan the string once and grab the field values as I get to each field marker? Yes. Yes, the machine is cpu-bound. My 768k data line will spike the cpu to 100% and hold it above 95% until the

Re: Code performance question #2

the sender immediately by telephone or email and destroy the original message without making a copy. Thank you. - Original Message - From: Peter Crowther [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Tuesday, August 08, 2006 5:02 AM Subject: RE: Code performance question

RE: Code performance question #2

From: Martin Gainty [mailto:[EMAIL PROTECTED] Please read http://www.javaranch.com/newsletter/200401/IntroToCodeCoverage.html paying particular attention to race conditions, deadly embraces and basic coverage of Functions Martin, I'm confused - could you just outline how code coverage

Re: Code performance question #2

Pid wrote: David Kerber wrote: Pid wrote: here's another obvious question: if you're in a servlet, and you're getting an separated string from somewhere, where is the somewhere that you're getting it from? does the servlet activate and collection the data somehow, or does the data

Re: Code performance question #2

Peter Crowther wrote: From: David Kerber [mailto:[EMAIL PROTECTED] Do you think it be more efficient to scan the string once and grab the field values as I get to each field marker? Yes. Yes, the machine is cpu-bound. My 768k data line will spike the cpu to 100% and hold it

Code performance question #1

I have a couple of questions about the performance of my code, but I'm going to ask them in separate threads. The first one is, if I have this loop: for ( ii = 0; ii data.length; ii++ ) { where data is defined as byte[] , is the .length property evaluated each time through the loop,

Re: Code performance question #1

By the way, this code is in a servlet running under 5.5.12, if it matters. David Kerber wrote: I have a couple of questions about the performance of my code, but I'm going to ask them in separate threads. The first one is, if I have this loop: for ( ii = 0; ii data.length; ii++ ) {

Re: Code performance question #1

data.length is evaluated each time. here's the example to demonstrate it: public class TestLoop { public static void main(String a[]){ byte data[] = new byte[10]; int counter = 0; for (int i=0; idata.length; i++){

Re: Code performance question #2

thats ugly, why don't you tokenize it into string pairs, store the pairs and works with them? leon On 8/7/06, David Kerber [EMAIL PROTECTED] wrote: This code is part of a servlet running in TC 5.5.12, jre ver 1.5.0.6. I use this code to break out individual data fields from a line which is

RE: Code performance question #2

From: David Kerber [mailto:[EMAIL PROTECTED] It is executed for over 2 million data lines per day, so this routine is executed over 10 million times per day. [snippet of code that parses the line each time elided] Opinion: You're optimising the wrong piece of code. You're calling this 5

Re: Code performance question #1

Thanks for the help! Leon Rosenberg wrote: data.length is evaluated each time. here's the example to demonstrate it: public class TestLoop { public static void main(String a[]){ byte data[] = new byte[10]; int counter = 0; for (int i=0; idata.length; i++){

Re: Code performance question #2

I'm not sure how to Split it on the , put it into a suitably keyed structure such as a Map other than the way I'm doing it already, unless I'm not understanding your suggestion. So I think I need to give a bit more info about how this is used: I can't control the data coming in; it's from a

Re: Code performance question #2

See my response to Peter; I can't control the format of that data string (it's from a different application). I just need to split out the data fields and store them away in a disk file. Or am I missing the point of your suggestion? Dave Leon Rosenberg wrote: thats ugly, why don't you

RE: Code performance question #2

From: David Kerber [mailto:[EMAIL PROTECTED] Is there a more efficient split method I could use? Or am I completely missing the point of what you are suggesting? I think you've slightly missed the point. I assume you're calling your function 5 times, each with a different field name that

Re: Code performance question #2

here's another obvious question: if you're in a servlet, and you're getting an separated string from somewhere, where is the somewhere that you're getting it from? does the servlet activate and collection the data somehow, or does the data get sent to the servlet (in, for example the query

Re: Code performance question #2

Peter Crowther wrote: From: David Kerber [mailto:[EMAIL PROTECTED] Is there a more efficient split method I could use? Or am I completely missing the point of what you are suggesting? I think you've slightly missed the point. I assume you're calling your function 5 times, each with a

Re: Code performance question #2

Pid wrote: here's another obvious question: if you're in a servlet, and you're getting an separated string from somewhere, where is the somewhere that you're getting it from? does the servlet activate and collection the data somehow, or does the data get sent to the servlet (in, for example

Re: Code performance question #2

David Kerber wrote: I haven't run a profiler on this code; I've tried, but getting the configuration figured out has stumped me every time. I have had good results with YourKit. Simple to set up and a nice output that shows where the time is spent. I have used to to investigate reported