Actually, one of the options that I considered was using paging tags, and displaying the data say 20 or 50 records at a time. However, the users may have a need to see all the data at once in a "data storm" situation. There may not be as many rows, but its not impossible, so the application has to be able to handle it gracefully.
Cheers... Dave -----Original Message----- From: David Graham [mailto:dgraham1980@;hotmail.com] Sent: Friday, November 01, 2002 1:49 PM To: [EMAIL PROTECTED] Subject: Re: WebLogic/Struts/JSP performance woes... I've not experienced this but 1760 rows seems like a lot to me. Will your users be able to view and process all this info? David >From: Davide Bruzzone <[EMAIL PROTECTED]> >Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]> >To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]> >Subject: WebLogic/Struts/JSP performance woes... >Date: Fri, 1 Nov 2002 13:43:26 -0700 > >Greetings all... > >I'd like to try to find out if anyone else out there is using WebLogic >(We're using version 6.1 SP2) with Struts and/or just JSPs that might have >some performance tips that they might be able to share... > >Here's what's happening: > >I have a page that, for test purposes, is generating a 1760 row table (Not >a >gigantic table by any stretch of the imagination). Although I don't expect >our data sets to be this big all the time, I need to make the application >responsive (i.e. If it starts displaying rows immediately - while its still >spitting out other rows - that's fine. What's unacceptable is if the >application takes a while to do whatever its doing, and doesn't generate >any >output until its done, leaving the user with a blank page while they wait). > >I started out using Struts on the page, and found that the performance >wasn't good enough. So I converted the portion of the page that loops >through the contents of a collection of objects and creates the output to a >scriptlet - the reasoning being that I could perform the relatively simple >processing more directly/with less overhead if I just did it directly). >Performance improved somewhat, but I'm still faced with the problem related >to the fact that I don't get any output immediately (regardless of how long >the whole page takes to generate). > >I've tried what seems like an endless combination of alternatives, with >mixed results (And that's one of the problems... I seem to get wildly >different results even with exactly the same code!). Here's what I've >tried: > >- I've set the buffer page directive to "none" >- I've tried to remove any Struts tags from the page in different >combinations (with mixed results) >- Since the page originally used templates (We're using Struts 1.0.2), I >tried to remove those, and have just one page (Again, with mixed results) >- I've added out.flush() at the end of each loop iteration (The intention >being that the server should spit out the row as soon as its done with it). > >I've also added logging to the JSP to see how long each step is taking, and >as I've said, I keep getting mixed results (Both when I use our real data, >and, say, a loop that prints out "Hello" one million times). Sometimes rows >seem to start to display before the server is done, and sometimes they >don't. Sometimes the loop takes a long time to process, and sometimes it >doesn't... Here's some sample log output for the loop: > >%%%%%%%%%%%: Done with initialization... Starting loop... Fri Nov 01 >13:17:49 MST 2002 >1557934 [11-01 13:17:49:512] INFO [ExecuteThread: '11' for queue: >'default'] (__surveillancepanel.java:332) - ######### >###########: Flushed... 0 >1559871 [11-01 13:17:51:449] INFO [ExecuteThread: '11' for queue: >'default'] (__surveillancepanel.java:332) - ######### >###########: Flushed... 500 >1561934 [11-01 13:17:53:512] INFO [ExecuteThread: '11' for queue: >'default'] (__surveillancepanel.java:332) - ######### >###########: Flushed... 1000 >1564527 [11-01 13:17:56:105] INFO [ExecuteThread: '11' for queue: >'default'] (__surveillancepanel.java:332) - ######### >###########: Flushed... 1500 >1566074 [11-01 13:17:57:652] INFO [ExecuteThread: '11' for queue: >'default'] (__surveillancepanel.java:336) - %%%%%%%%% >%%%%%%%%%%%: Done with loop... Fri Nov 01 13:17:57 MST 2002 > >So I know that the server is able to process 500 rows of output in 63 >milliseconds (See the difference between row 0 and row 500). However, I'm >still getting this lag time before I start to see any output. > >If I'm doing something wrong with regard to Struts, and can get the rows to >display as soon as they're available, I'm perfectly willing to use Struts >(or whatever other approach works). Does anyone have any experience in this >area? Any help would be greatly appreciated... > >Cheers... > >Davide Bruzzone > >-- >To unsubscribe, e-mail: ><mailto:struts-user-unsubscribe@;jakarta.apache.org> >For additional commands, e-mail: ><mailto:struts-user-help@;jakarta.apache.org> _________________________________________________________________ Unlimited Internet access for only $21.95/month. Try MSN! http://resourcecenter.msn.com/access/plans/2monthsfree.asp -- To unsubscribe, e-mail: <mailto:struts-user-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:struts-user-help@;jakarta.apache.org> -- To unsubscribe, e-mail: <mailto:struts-user-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:struts-user-help@;jakarta.apache.org>
