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Data disappearing during vertical scroll in Grid for huge dataset
Hi,
My data in grid is displayed correctly when I have less than 200 rows. But when I exceed that limit and try to scroll vertically the data in the grid disappears and appears after couple of seconds. It happens everytime I use scroll. The free flow of data is lost and have to wait for page to refresh.
I would appreciate if any suggestion in this regards is provided.
Thanks & Kind Regards,
Jameel.
Jameel.
Thursday, February 5, 2009
Please provide more info:
Are you using setVirtualMode(true) ?
How many columns?
Also happens when using pag-down key? and/or arrow-down key?
OS and Browser ( version)
AW version
Thanks
Carlos
Thursday, February 5, 2009
Thursday, February 5, 2009
Thanks for your reply.
Grid virtual mode is turned on after 200 rows.
Columns: 6
Yes its happening on pa-down, arron-down and mouse scroll.
OS: XP
Browser : IE 6 & FF 2
AW: 2
Thanks,
Jameel.
Jameel
Thursday, February 5, 2009
Also I wanted to know the disadvantages or impact if I increase the Virtual Threshold as I feel increasing it would fix my issue?
Thanks,
Jameel.
Jameel
Thursday, February 5, 2009
Thanks Jameel,
Well, pre-fetching rows in virtual mode could help ( you need to do some tests on it), but in general I think re-rendering on scroll depends on some other factors.
- xlm data model is slower than csv or array.
- AW Versions above 253 are much slower rendering when using large number of columns and/or many visible columns.
- Large Visible number of rows also counts.
( last 2 factors can be easy demostrated by increasing grd sizes in the above virtual sample) .. i.e obj.setSize(700, 850);
- Strong formated columns could increase time also.
HTH
Carlos
Friday, February 6, 2009
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