10g forms applet very slow
I've just converted a couple of 6i client server forms to 10g.
I'm using the Developer suite 10gR2, with its own built-in oc4j server.
It all works fine, after some fiddling to get icons loaded etc.
But the form is 10 times slower than in client-server. This is a total show-stopper for us. A form that took 2-3 seconds to load before can now take nearly a minute to come up.
Even our very simple login form is slow, many seconds instead of a fraction of a second.
I've tested on the workstation thats running the OC4J, This is a Dual-Xeon 2.4Ghz with 2G of memory, so its NOT the hardware. Its running XP-Pro.
Then I tested on a workstation, using a dummy html page to launch Jinitiator and get the form up. JInitiator installed itself perfectly, but erformance is exactly the same even though its a P-III-800 with only 256M of memory.
The strange thing that we notice is that the performance monitor on the oc4j server machine shows it as almost idle (3% cpu, almost no network traffic and idle disk).
But on the workstation the cpu is at 80-90% all the time, even when the form is just sat there waiting for user input!
So we think we have some sort of applet mismatch or configuration problem. Is there a newer (or older?) applet version thats quicker, or doesn't nail the cpu this way?
My next step is to download just the forms-and-reports services for linux and put that up on a second identical box that has Redhat-ES.
Has anyone else seen this sort of applet behaviour? if so any suggestions would be a great help because we're stumped at the moment.
Good feedback folks, but I still don't see any explanations of whats happening, or why it should be slow.
I'll agree that putting the icons in a single file, one jar archive per form, is definitely more efficient. Putting all your icons in one file strikes me as silly since then you have to download all the icons, even if you never bring up forms that use some of them.
BUT gentlemen, it does not explain why we had the problem I described. I see no reason to suspect that the jar file would fix my problem, (of course I'll try anyway).
The point here is that the form was slow to start, OK, maybe that was because it was individually fetching 15 or 20 icon files.
BUT WHY SHOULD IT THEN BE SLOW AFTER THAT!
Sorry to shout but no-one seems to be hearing what I'm saying here:
1) the applet has the CPU locked-up at over 90% all the time
2) the cpu is at 90% when the form is idle waiting for input.
3) the form has completed painting the user interface just fine, I can see everying,
including all the icons, it all works right, its just slow.
4) its not surprising that its slow since the applet has the cpu pegged
5) we get the same pattern of behaviour on a form that has exactly one icon,
for a download of one file, a total of 232 bytes.
Now there is no way you can claim that a jar archive is significantly faster
than a single gif file download, they are both cached and the sizes are both so small that any difference is insignificant.
It looks to me like a bug in the applet, or some sort of configuration or set-up error on my part. But I can't find any documentation on how to control that. The applet itself appears to be very much a black-box with no visibility into whats going on inside it. No trace file, no log file, no debug options.
I mean debugging the applet itself here, not the form that the applet is presenting to the user.
I'm going to work on bringing it up on Linux today, for now I'll just run without icons while I get the forms/reports integration running. Then I'll come back to the icon issue next week. Maybe if I switch to jpegs the problem'll go away. SO I'll post a follow-up sometime next week.
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