Dear FSX-Experts,i recently switched from WinXP to Win7/64 and i think it was a very good decision. Along with that i decided to install the OS on a new Samsung 64GB SSD (with Trim-Support).So use my 500 GB HDD for FSX only and another 250 GB HDD for other Games etc.. One of the main reasons for a SSD was that in my opinion the perfomance of the Windows Swap-File is essential for a good FSX-performance.You can see in the task manager the use of virtual memory is equivalent to the use of (real) system memory. As this now laid out on the SSD i think the overall performance in loading textures has grown significantially. One of the main miracles to me ist that FSX "loses" textures that fast. Sounds weird but i try to explain. I think everyone knows this effect: you look out of your VC-cockpit to the left, textures of AI-AC etc. are being loaded - OK - look to the right on a huge aiport (FSDT KJFK), textures for buildings etc. loaded - fine - but when you look now to the left again very often all textures have to be loaded again. Sometimes fast, sometimes real slow. They are not properly buffered in RAM or VRAM (i have 1792 MB VRAM - kind of useless it seems) but loaded from HDD again. It seems to me that (although 3 Gigs of System RAM are in use) almost everything is loaded from HDD again or - as i suspect - from the swap file. I never seen a behaviour like this in any game (i know, i know it's a sim! :-)).Now i just want to be enlightened by an expert (Bojote?) what exactly is laid out in the swap-file by FSX, why is it that huge (never seen that with other games etc), what impact has VRAM on FSX and is there a chance to tune the use of it in any way.Thanks in advance!Ingo

what exactly is laid out in the swap-file by FSX

The swap file (or page file) is not managed by FSX, but by windows itself. It contains memory pages in use by the various applications and services running on your system. How much physical memory have you got installed?Are you sure the texture lag you see is due to reads from the hard drive? Try opening the resource monitor and watch the "Hard Faults/sec" statistic when switching views in the situation you describe. If memory pages are being read from disk, you will see a high spike of hard faults every time you switch.On my system (6GB physical memory), I do see texture lags when switching views, but there are no (or a very low number of) hard faults, so this is due to memory bus transfers.

The swap file (or page file) is not managed by FSX, but by windows itself. It contains memory pages in use by the various applications and services running on your system. How much physical memory have you got installed?Are you sure the texture lag you see is due to reads from the hard drive? Try opening the resource monitor and watch the "Hard Faults/sec" statistic when switching views in the situation you describe. If memory pages are being read from disk, you will see a high spike of hard faults every time you switch.On my system (6GB physical memory), I do see texture lags when switching views, but there are no (or a very low number of) hard faults, so this is due to memory bus transfers.

Thanks for you reply. I have 4GB installed (see Signature for further details). In EGLL with PMDG 747 3 - 3.5 Gigs are often used (and the page-file is at appx. 2.5 or more Gigs).Thanks for the hint with the "Hard Faults/sec", i will check that later.ByeIngo