Lightroom does not release memory.

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  • Updated 5 years ago
Yesterday I was using Lightroom 4.4 to make an update to the metadata of all my photos at once. It took over an hour and during that time it used about 7GB of the 8 may machine has. After it was done, it did not release most of that memory. I had to close Lightroom to release the memory.
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Blue Barron

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Posted 5 years ago

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jdv, Champion

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First of all, you don't mention the platform you are on.

Second of all, each platform has different ways of managing memory. On recent OS X, for example, memory can actually be released but still be owned by a process. Or nothing else has requested memory resources, or the system is still busy handling page requests.

The point is that it is very, very difficult to determine that a process is leaking memory just from looking at the activity monitor. You have to attach a monitor or benchmarking tool to the process to be sure of anything, because the nice blue, red, yellow, green image doesn't actually tell you much about specific processes.

It all comes down to how the OS manages resources. The real question here is, did you have any other process on this machine that, afterwards, was starved for physical memory, and was either throwing out-of-mem exception or forced to page?

At the end of the day, it doesn't matter what a monitor tells you it thinks the memory is divided up, but rather that all the processes that ask for resources get it in a timely manner. Did you try opening up a resource hungry app after Lightroom was complete and idle?
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Blue Barron

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I am running Windows 7 64 bit SP1 on a machine with a quad processor, 8GB of RAM and a graphics card with 750MB of video RAM. Any process that I tried to start before closing Lightroom, ran extremely slowly. These include MS IE, Firefox, MS Office Outlook. I opened these one at a time, not together, except that Lightroom was open. I closed all none essential processes. Lightroom itself was running slowly. Normally I can have a browser and Out look open at the same time as Lightroom without any trouble, but not after making the mass change in the meta data in Lightroom. I am running Lightroom 4.4 64 bit. Once I closed Lightroom and reopened it, I could open the other programs too and everything ran normally.