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Mark J M WilsonCommunity Member

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Performance in LR3 library

Jun 9, 2010 5:17 AM

Anyone else having problems stepping through files in the LR3 Library module?

Develop seems to work fine, its just library giving me problems. I can step through 15-20 18mp RAW files in loupe view and then Lightroom seems to slow right down or stop for a few seconds. If I leave it for a while, it goes back to normal. I

I have to really speed through 50 or so 8mp files to get similar problems.

Further investigation reveals that the drives are thrashing when LR3 'stops'.

By watching a combination of LR's system info and windows resource monitoring, it seems that LR3 uses about 20% of total RAM and then stops and hits the drives...but neither virtual or physical RAM use seems to increase any further. I have to wait for the RAM to be released and then all seems OK until it hits the 'ceiling' again.

My system:

Win 7 pro 64bit.

Intel i7 965 extreme

6gb RAM

nVidia GTX 260 (driver version 197.45)

Relevant internal drives (all with space, 7200rpm):

disk 1: windows + apps (no windows swap)

disk 2: document data + CR cache (set to 100gb)

disk 3: catalogs, previews + photo files

disk 4: windows swap

Interestingly, the windows disk seems to be under load when it slows down, although I can't see why based on my config.

I have tried new catalogs, upgraded catalogs, purging previews, purging CR cache, 1:1 previews, putting previews on a 5th internal disk...

Anyone any ideas?

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Dorin Nicolaescu-Musteață,

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Jun 9, 2010 6:13 AM

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purging previews
Have you tried building previews?

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Mark J M Wilson,

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Jun 9, 2010 6:26 AM

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Yes I did. I should have been more explicit - I recreated previews after discarding (1:1 and standard). There is no problem until the memory 'ceiling' is reached - i.e. the photos normally load immediately and there is no 'Loading...' overlay as you would expect if the previews have not been created.

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Mark J M Wilson,

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Jun 9, 2010 4:22 PM

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I have now checked the same set of 7D images in LR2.7 - I can step through them in loupe view with out any issues at all.

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Charley100,

Jun 9, 2010 5:39 PM

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I had exaclty the same problem, couldn't work in Library and it was fine in Develop. I reduced the resolution of my monitor and everything was fine. On my computer must have something to do with the older prosessor and the screen resolution.

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Mark J M Wilson,

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Jun 10, 2010 12:19 AM

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Interesting Charley - seems to be the resolution causing the problem. A quick test with a new catalog and only 159 18mp photos, 1:1 previews generated.

If I have LR3 maximised at 2560x1600, I hit the 'memory ceiling' and the disk starts thrashing after 20 images or so (RAM usage peeks at about 1.2gb).

If I have LR3 maximised at 1680x1050 (different screen), it steps through fine.

Run the same test with LR2.7, it steps through the images fine on both screens (RAM usage peeks at about 0.5gb)

I raised a bug on this last night but didn't get a number - I thought you got a number to track? I want to update it with this info.

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Dorin Nicolaescu-Musteață,

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Jun 10, 2010 2:03 AM

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I hit the 'memory ceiling' and the disk starts thrashing after 20 images or so (RAM usage peeks at about 1.2gb).

How can it hit the memory ceiling at 1.2 GB on a 6GB machine running 64-bit windows? You're running 64-bit Lightroom, right?

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Mark J M Wilson,

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Jun 10, 2010 3:16 AM

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dorin_nicolaescu wrote:

How can it hit the memory ceiling at 1.2 GB on a 6GB machine running 64-bit windows? You're running 64-bit Lightroom, right?

I don't know why LR3 won't use more RAM - it was a surprise to me. To clarify the memory usage, this is 1.2GB used by LR3, as reported in the system info dialog. Total memory usage was only about 4 GB.

I am 99% sure I have the 64bit version installed on that machine but will check when back to my office this evening.

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Mark J M Wilson,

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Jun 11, 2010 6:16 AM

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Yes I do have the 64 bit version installed. More testing this morning and I found this using Windows Resource Monitor:

- Open LR3 and only step through images in loupe view, with LR3 maximised on the larger screen. The disks start thrashing when 50% of total physical memory is in use.

- Now flip into develop mode, LR3 uses more memory (i.e. total memory use in Windows is now above 50%).

- If I flip back to Library I can keep stepping through images again until about 90% physical memory is used and the disk starts thrashing again.

If I make the window smaller than maximised, LR3 eats memory much slower...but I have to now zoom more regularly to check sharpness etc - so no faster for my workflow.

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Lou Gonza,

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Jun 13, 2010 9:30 AM

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I'm having some of the same issues. The import dialog is running super slow for me. I'm running 64 bit Vista, dual 2.6 processor with 8 gb of RAM, with an ATI 4570 HD video card. And the LR3 is running worse than 2.7 did for me. When I scroll through the images to choose which images to import, LR3 eventually freezes up. I read this thread and reduced the window size of LR3 when working on my 24" moniotr and that seems to help. But over time it seems to get slower and slower as i scroll through the images, eventually slowing to a painful crawl. So much so that it takes about 30-45 seconds to scroll to the next image. Ouch. Then when I finally import the files, the process completely takes over my machine. So much so that I cannot do anything else in LR or anything on my PC for that matter. I was importing and a few minutes ago. See my stats below. It was the only prgram running on my PC at the time.

I was very excited about LR3 but there seems to be some definite performance issues now that weren't present in 2.7. Am I doing something wrong? Is there something I should tweak in the settings of LR?

Even after the import is done, it appears my RAM stays pegged now while LR3 is open.

Also I am getting blurry thumbs in the import dialog. It's completely unusable. Is anybody else seeing this?

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_H_,

Jun 19, 2010 4:31 AM

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Same here, get to around 100 images and the library starts to stall and get shaky to the point it hangs. Give it a moment to think and we are ok for a while but then its not long before we start to stall again.

Quad core windows vista pc with 4GB of ram. I cant see why I should be having issues with this........

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