I have a DX application showing 12 yrs of commercial fisheries catch data. (about 100,000 records)
It shows glyphs for each catch with color/size set interactively to show catch size, vessel type, nationality, bycatch, time of day, etc. A single session may involve 5000 images being presented, but I can seldom get more than 100 without an error like: Exective:0: invalid data: Object deleted too often! (or not an object) or Invalid data: Deleting object of unknown class or Invalid camera angle <tho note that the camera is fixed for the sequence> or Bad parameter. Resolution must be a positive integer The fix is to stop/start the server & it runs OK until the next crash. I have 1Gb of memory installed in a P4 2400Mhz, running Mandrake Linux v9.0 DX is started with memory limited to 900Mb, the crashes appear almost certain when > 800Mb is used, but can happen with 600Mb used. I have used simple glyphs & turned Image caching off to reduce memory useage. Any suggestions as to how to make DX more robust for presentations of the data visualisation appreciated. The second problem pertains to the throttle settings. My system can show a year's data in about 20 seconds. I'd like to have it controllable to about 2-5 frames per second, but the throttle setting for the image (either by the config dialogue for the Image module or the window dialog) seems to have a mixed effect. At a value of two, it shows roughly one frame per second. At a value of one it shows between (estimated) 3 and 9 f/s, the speed seems to vary at different times, poss due to other processes kicking in, (but I can't find any such processes). Is there a way I can control the frame rate accurately & reliably (like I expected the throttle setting to do)? Thanks, Brent Wood
