Just in case anyone is interested, see this benchmarking from an earlier post. I still haven't figured out what causes the serious degradation on Unix with two or more concurrent reports. But I did find out it only occurs when running FOP on a servlet inside Weblogic! Two separate Java processes don't see the same degradation. I'm sure BEA support will figure out this problem in no time.
<<<>>> To benchmark I used a servlet with embedded FOP to render a 200 page PDF document from an XSLT transform on a static XML-file (no database connection is involved). Both boxes are running Weblogic 6.1. The XSLT transform takes very little time compared to the FOP renderer. I've tried a DomSource for input, a SaxSource, and the XSLTInputHandler. The results are almost exactly the same in each case. Below are the results I see. Initial heap size=max heap size in each case. Each server is running the latest JDK 131 (w/Hotspot). (I have set all the HP system variables (max_thread_proc, etc.) to Sun recommendations.) Nt dev box (NT4-Worksatation, PIII-933mhz, 512MB ram): Heap Size=64M, 1 report = 251ms/page Heap Size=64M, 2 reports = 750ms/page Heap Size=256M, 1 report = 245ms/page Heap Size=256M, 2 reports = 500/page HP server (HP-Unix, 2x550 mhz, 2GB ram): Heap Size=64M, 1 report = 545ms/page (frequent out of memory errors) Heap Size=64M, 2 reports = didn't try Heap Size=256M, 1 report = 372ms/page Heap Size=256M, 2 reports = 1700ms/page Heap Size=512M, 1 report = 350ms/page Heap Size=512M, 2 reports = 1675ms/page The only difference I can see for sure between the two boxes is that the NT machine performs at least 10 times as much garbage collection. (Sometimes several times per page, as opposed to once every 8-10 pages on the NT box.) Garbage collection occurs a little more frequenly on the HP box when I lower the heap size, but still not nearly as often as on the NT--at any heap size. Also the HP box runs out of memory if I lower the heap size. I was hoping this was due to some HP setting, but I'm starting to come to the conclusion that it's just some difference in the hotspot implementations. <<<>>> Amit wrote: > > Yup I run it under Linux and it is actually way faster than windowsNT or > 98. > I have the latest kernel 2.4.12 and am using jdk1.2.2 with 128MB or RAM > this is in my development environment. > > Jim Wright wrote: > > > I run complex table stuff on Linux with FOP pretty consistently, and > > have not experienced the slow-downs you mention. Are you running under > > Linux with a decent amount of memory? > > > > jw > > > > -----Original Message----- > > From: Alenka Skrbinek [mailto:[EMAIL PROTECTED]] > > Sent: Thursday, October 18, 2001 12:29 AM > > To: [EMAIL PROTECTED] > > Subject: Performance > > > > I have performance problems with Fop on Linux for S390. The same > > document (for example 4 tables on one page) takes 3 seconds on Win NT, > > while it takes more than one minute on Linux. The same happens with > > examples which came with FOP - they are slow on Linux. What should I > > do? > > > > Thanks!! > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, email: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
