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RE: [JBoss-user] Jboss on WIN2000
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From: Bill B. <bi...@jb...> - 2002-11-23 00:56:20
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What do you mean by upper limit? I can add more threads, but performance goes down 2-5% per 8 threads added. Please re-read my post. I am positive it is DB related. You're seeing just a hang? Do a thread dump. Look where things are hanging. Then get back to us (No I don't want to see a thread-dump of 270 threads so don't send it to me.) XXXXXXXXXXXXXXXX Bill Burke Chief Architect JBoss Group, LLC XXXXXXXXXXXXXXXX > -----Original Message----- > From: jbo...@li... > [mailto:jbo...@li...]On Behalf Of Chris Bonham > Sent: Friday, November 22, 2002 4:43 PM > To: jbo...@li... > Subject: Re: [JBoss-user] Jboss on WIN2000 > > > I forgot to point out the thread pool settings earlier, thanks > for bring that > up: > > Jetty/Tomcat maxProcessors: 20000, acceptCount: 20 > > Oracle Connection Pool Max: 1200 (never hit that many though) > > Maximum Number of Oracle Processes: 4096 > Maximum Number of Open Cursors: 300 > > I don't think these settings are limiting the test, but I'll > check to database > again. > > Also, is the 240 user statistic from the ECPerf test an upper > limit in JBoss > given your configuration? > > Thanks. > > -- > Chris Bonham > President/CEO > Third Eye Consulting, Inc. > bon...@th... > http://www.thirdeyeconsulting.com > 317.823.3686 > 317.823.0353 (FAX) > > Quoting Bill Burke (bi...@jb...): > > Are you sure you have enough threads configured for Tomcat or > Jetty? They > > have a thread pool ya know. > > > > ALSO: > > Make sure your DB is not maxed out on I/O. > > > > I had 1 JBoss machine, 1 DB machine, and one driver machine for > an ECPerf > > test. > > > > JBoss machine: > > dual-cpu 1.8 ghz AMD MP2200+, 1 gig ram, running Windows XP > > > > DB machine: > > Inspiron 8100 laptop running Oracle 8.1.7, 1 ghz, 512M ram, crappy disk > > drive (4200rpms). > > > > Driver machine(remote EJB client): > > Dell desktop. 1 ghz, 512M ram. > > > > 1. Ran ECPERF with commit option 'A', got results, maxed > performance with > > 240 concurrent users. > > 2. Switched one entity bean to commit-option 'B' > > 3. Reran test with 240 concurrent users. Lost 30% in performance. > > > > Conclusion: > > DB maxed I/O maxed out. > > > > Ran maxed out peformance test adding 8 threads extra to up to > 24 threads. > > Performance degraded about 2-5% with each increment beyond 240 > concurrent > > users. > > > > XXXXXXXXXXXXXXXX > > Bill Burke > > Chief Architect > > JBoss Group, LLC > > XXXXXXXXXXXXXXXX > > > > > -----Original Message----- > > > From: jbo...@li... > > > [mailto:jbo...@li...]On Behalf Of > Chris Bonham > > > Sent: Friday, November 22, 2002 11:17 AM > > > To: jbo...@li... > > > Subject: Re: [JBoss-user] Jboss on WIN2000 > > > > > > > > > Thanks for posting your performance tuning procedures, they > > > helped us a lot. > > > > > > We are load testing under a clustered environment with JBoss > 3.2.0beta2. > > > Here's our client and server load test machine configurations: > > > > > > Dual Intel Xeon 2.0 GHz Processor w/1G RAM > > > RedHat Linux 7.3 > > > Kernel Version: 2.4.18-3smp > > > > > > The app uses JSPs and the EJB Facade pattern backed by an Oracle > > > 9i database. > > > > > > We changed the STACK_SIZE to 256k and PTHREAD_THREADS_MAX to 16384 and > > > recompiled glibc. Using a C program were able to max out the > number of > > > pthreads at 12276, which is acceptable for our current needs. > > > > > > We're using Sun's JDK 1.3.1_05 and 1.4.1-b2 (both IBM and > JRockit hung in > > > other tests). > > > > > > However, when load testing around 500 concurrent users, JBoss seems to > > > stop responding around 270 users. It doesn't matter if we use > > > Tomcat 4.0.6, > > > 4.1.12, or Jetty 4.1.3, so now I'm trying to record some > > > performance metrics > > > using org.jboss.ejb.plugins.MetricsInterceptor. > > > > > > I know every application is different (and we could very well > have bugs in > > > ours), but in general, given a similar application and > > > environment, how many > > > concurrent users have others been able to scale to with JBoss? > > > > > > Thanks. > > > > > > -- > > > Chris Bonham > > > President/CEO > > > Third Eye Consulting, Inc. > > > bon...@th... > > > http://www.thirdeyeconsulting.com > > > 317.823.3686 > > > 317.823.0353 (FAX) > > > > > > Quoting Stephen Davidson (go...@fr...): > > > > Greetings. > > > > > > > > I have been getting more than adequate performance on some > > > boxes running Linux 2.4.10 & 2.4.18. The 2.4.18 does appear to > > > be somewhat faster. I have not had a chance to run a full > load test on it > > > > yet, however. > > > > > > > > The CPUs are 1.2Ghz AMDs, with 1.5GB 133Mhz SDRam. > > > > > > > > You did tune your kernels, though, right? By default, the > > > Linux kernels only allow 64 threads/process, and I think it was > > > 1024 processes system. And under these defaults, JBoss has a > > > limit of about > > > > 200 users, after which performance nose dives and stability > degrades. > > > > > > > > For your convenience, I have attached a document for what we > > > did to boost our threading capabilities. I would be interested > > > to here how it works for you. > > > > > > > > -Steve > > > > > > > > > > > > > > > > Bill Burke wrote: > > > > > > > > > Actually, I've been doing some performance tests > > > lately(ECPERF) and Linux > > > > > sucks, really sucks. (Haven't tried the IBM threading model > > > though). Win2k > > > > > is much better performing, although I hate to admit it. > > > > > > > > > > Bill > > > > > > > > > > > > > > >>-----Original Message----- > > > > >>From: jbo...@li... > > > > >>[mailto:jbo...@li...]On Behalf Of > > > > >>ma...@bo... > > > > >>Sent: Thursday, October 03, 2002 4:32 AM > > > > >>To: jbo...@li... > > > > >>Subject: Re: [JBoss-user] Jboss on WIN2000 > > > > >> > > > > >> > > > > >>Why not upgrading to a better OS like linux or *BSD? > > > > >> > > > > >>On Thu, Oct 03, 2002 at 12:56:29PM +0530, Arijit Ghosh wrote: > > > > >> > > > > >>>I am using Jboss3.0 with Tomcat 4.0.3 with Win98. I plan > to use with > > > > >>>Win2000. ANyone has faced any issues that I need to take > care of when > > > > >>>deploying ? I DON'T want to use it as service for Win2000. > > > > >>> > > > > >>>Regards, > > > > >>> Arijit > > > > >>> > > > > >>> > > > > >>> > > > > >>> > > > > >>>------------------------------------------------------- > > > > >>>This sf.net email is sponsored by:ThinkGeek > > > > >>>Welcome to geek heaven. > > > > >>>http://thinkgeek.com/sf > > > > >>>_______________________________________________ > > > > >>>JBoss-user mailing list > > > > >>>JBo...@li... > > > > >>>https://lists.sourceforge.net/lists/listinfo/jboss-user > > > > >>> > > > > >>-- > > > > >>MVH > > > > >>Marius Kotsbak > > > > >>Boost communications AS > > > > >> > > > > >> > > > > >>------------------------------------------------------- > > > > >>This sf.net email is sponsored by:ThinkGeek > > > > >>Welcome to geek heaven. > > > > >>http://thinkgeek.com/sf > > > > >>_______________________________________________ > > > > >>JBoss-user mailing list > > > > >>JBo...@li... > > > > >>https://lists.sourceforge.net/lists/listinfo/jboss-user > > > > >> > > > > > > > > > > > > > > > > > > > > > > > -- > > > > Java/J2EE Developer/Systems Integrator > > > > 214-724-7741 > > > > > > > > > > > This is how I rebuilt glibc. > > > > > > > > I got the latest version of glibc(glibc-2.2.5.tar.gz) and > > > glibc-linuxthreads > > > > (glibc-linuxthreads-2.2.5.tar.gz) from www.gnu.org. I unzipped > > > both of them > > > > placing the thread libraries inside of the glibc directory > (the threads > > > > library is a component of glibc). > > > > > > > > Change the following C header files to up the threads. (I > got this from > > > > http://www.volano.com/linuxnotes.html) > > > > In glibc/linuxthreads/internals.h, change the size of the > thread stack > > > > reserve from 2 megabytes down to 256 kilobytes (with a page > > > size of 4,096 > > > > bytes): > > > > > > > > STACK_SIZE (2 * 1024 * 1024) -> (64 * PAGE_SIZE) > > > > > > > > In sysdeps/unix/sysv/linux/bits/local_lim.h under > > > glibc/linuxthreads, change > > > > the Posix thread implementation limit from 1,024 per process to > > > 8,192 per > > > > process: > > > > > > > > PTHREAD_THREADS_MAX 1024 -> 8192 > > > > > > > > Now, From inside the glibc directory execute the following > command to > > > > generate the make files: > > > > > > > > ../configure --enable-add-ons --prefix=/usr > > > > > > > > Then type make to build and then make install to install > the libraries. > > > > Finally execute ldconfig -v to update the library cache. > > > > > > > > I referenced > http://www.imaxx.net/~thrytis/glibc/Glibc2-HOWTO-5.html in > > > > building the new glibc. You dont have to follow the docs > word for word > > > > because its not a major change (like from glibc 5 to 6) > > > > > > > > Thats about it! > > > > > > > > Kyle > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------- > > > This sf.net email is sponsored by:ThinkGeek > > > Welcome to geek heaven. > > > http://thinkgeek.com/sf > > > _______________________________________________ > > > JBoss-user mailing list > > > JBo...@li... > > > https://lists.sourceforge.net/lists/listinfo/jboss-user > > > > > > > > ------------------------------------------------------- > > This sf.net email is sponsored by:ThinkGeek > > Welcome to geek heaven. > > http://thinkgeek.com/sf > > _______________________________________________ > > JBoss-user mailing list > > JBo...@li... > > https://lists.sourceforge.net/lists/listinfo/jboss-user > > > ------------------------------------------------------- > This sf.net email is sponsored by:ThinkGeek > Welcome to geek heaven. > http://thinkgeek.com/sf > _______________________________________________ > JBoss-user mailing list > JBo...@li... > https://lists.sourceforge.net/lists/listinfo/jboss-user |