![]() Even with my camera set to produce JPEG Fine, the images max out at about 12MB, and I've always gone with JPEG Standard, at about 7MB per image. I don't have any of those humongous original images. I'm not the person to be doing this testing. Let me know whether you feel that the possibly lower image quality is acceptable. If you set logging level to FINE, then jAlbum will print what subsampling each loaded image uses. ![]() To activate this new subsampling for the Smooth image scalers, edit jAlbum.ini (Windows) or jAlbum.cfg (Mac) and add: -DmaxSubsampling=2 You should therefore still get better scaling quality with Smooth scaling combined with maxSubsampling=2 than with MediumScaler. The Medium scaling quality always does subsampling (if possible), but is more aggressive, and would typically use a factor of 4 when subsampling a huge 25Mpixel image. With maxSubsampling=2, they're loaded in 25% the size initially and then scaled down further to their correct size. Modern huge JPEG images in the 25Mpixel range are typically scaled down 5 times in width and height during image processing. I reason that setting maxSubsampling=2 is pretty careful while gaining a substantial RAM saving. Setting this to "2" for instance cuts RAM requirement down to 25%. I've now added an experimental system property called "maxSubsampling" where you can allow jAlbum to subsample images while loading, even when using Smooth image scaling. Then I guess you actually don't lose much by setting the # of threads to 6 instead of 12.Īnyway, I've been digging into the RAM usage of jAlbum during image loading and scaling, and it's obvious that jAlbum consumes huge amounts of RAM when loading images when the scaling setting is set to "Smooth". This is already the default setting in Windows installations of jAlbum.On you computer: Is it a CPU with 6 real cores, but each core also having a virtual core, making 12 simulated cores?Įxactly - six physical cores, each handling two threads. Most systems will exhibit only very short pause times barely noticed by the user. It optimizes throughput and footprint at the cost of maximum pause time. When processing large images or large albums use the Parallel Garbage Collector by specifying -XX:+UseParallelGC. On a Windows or macOS platform, the default heap size should always be specified. Specify a higher value only when encountering an out of memory error. Start with default heap size, which defaults to 25% of physical memory of the machine. Users may want to start with these values and make changes only if required: Recent versions of Java have sensible platform dependent default settings for many parameters relevant to garbage collection, see: Garbage Collection Tuning Guide. Ensure that Use hardware accelerated scaling is checked under Settings->Images->Advanced.Set the image scaling method under Settings->Images to Medium.Lower the # of threads under Preferences (ctrl/cmd+,) -> General.Some general hints on lowering memory usage You can check if you are running a 32bit version or a 64bit version if you go to jAlbum-> About jAlbum. ![]() If you are running a 32bit version of jAlbum the value can not be set higher than 1400M. You may allow larger heap sizes by specifying huge values, e.g. This will allow heap size to grow up to 25% of available physical memory (4G on a machine with 16 G total). For allowing larger heap size omit -Xmx1200M from the command. The default invocation limits heap size to 1200M specified in your sktop file - usually it is in /usr/share/applications/. Note: the '-Xmx4000M' value above is for example only, the actual value may vary from machine to machine. Look for -Xmx4000M and change it to -Xmx8000M for instance. ![]() Now edit the file "jAlbum.cfg" in a text editor. To give jAlbum more memory on Mac you can go to Tools -> Open Directories -> Program Directory. Īnd change the value -Xmx4000M to -Xm圆000M or -Xmx8000M and save the file. Virtual Machine Parameters=-Xms64M -Xmx4000M. Now close the jAlbum application, and open the jalbum.ini file in a text editor. To give jAlbum more memory on Windows you can go to Tools -> Open Directories -> Program Directory. It can happen if you for instance have an album with a large number of images or if you have really large original images. When you are getting heap space errors, such as ‘OutOfMemoryError’, in jAlbum it is because jAlbum is running out of memory.
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