Submitted by jan_rifkinson on 2010/08/07 15:24
I have a lot of memory on my machine, both graphics & basic RAM
Put it this way; w the following programs open (2 in particular are heavy graphics)
 
IQ
FF
Adobe Lightroom
Adobe PhotoShop
 
I'm using +/- 45% of RAM
 
Every time I get up around this level, IQ display starts to act up even with only a few grids open.
I can't tell you that it does this or that every time as it changes. All I know is stuff happens.
I lose control of my cursor
Grid display disappears (blank)
can't enter / modify / delete data
etc, etc
 
I can also say that (so far) IQ is the only other program that acts up under these circumstances
I don't know what part of memory IQ uses & it's been many years since I've thought about memory swaps, etc so.....
Maybe it's Win 7; don't know
Just thought I'd mention it.

Comments

Thanks for reporting. How many grids do you have opened at the same time (when this occurs) ?
 

jan_rifkinson

2010/08/07 17:32

Permalink

 Pierre, I can't give you a difinitive answer but I can say that I usually work w 3-5 grids HTH

 These are all very demanding Applications, especially in terms of GDI objects.  Windows can only accept a definite number of GDI objects otherwise it starts to act up.
 
[quote]
Vista, and Windows 7 have a configurable limit (via the registry) that defaults to 10,000 objects per process (but a theoretical maximum of 65,536 for the entire session). [10][11]
[/quote]
 
It could be that. I know that I'm personally subject to GDI objects problems once in a while.

jan_rifkinson

2010/08/08 15:49

Permalink

Thanks, Armando. A bit above my head but I did notice the following that may be applicable:
[quote] Windows 7

Windows 7 includes GDI hardware acceleration for blitting operations. This improves GDI performance using new features in the Windows Display Driver Model v1.1. This allows the DWM engine to use local video memory for compositing, thereby reducing system memory footprint and increasing the performance of graphics operations. Most primitive GDI operations are still not hardware-accelerated, unlike Direct2D. As of November 2009, both ATI and Nvidia have released WDDM v1.1 compatible video drivers.

GDI+ will continue to rely on software rendering in Windows 7.[6] [/quote]  I have Nvidia & AFAIK, I have the latest drivers but I'm going to double check that based on this article.