Yes, the way GIMP uses GLIB's memory allocation needs to be reviewed. This problem was reported before in https://bugzilla.gnome.org/show_bug.cgi?id=759874 (re-assigned to GEGL, though I believe this is really a GIMP problem). Try running GIMP thus: export MALLOC_MMAP_MAX_=200000 export MALLOC_MMAP_THRESHOLD_=128*1024 gimp-2.9 .... On Fri, Mar 11, 2016 at 5:11 PM, Elle Stone <ellestone@xxxxxxxxxxxxxxxxxxxx> wrote: > My system has 32GB RAM. I'm running Gentoo Linux and using GIMP 2.9 > updated very recently. > > I opened five or six large (1 to 2 GB each) XCF files and then closed all > but one of the files (not having an image browser that can produce a > thumbnail for GIMP 2.9 XCF files, I was trying to figure out which file was > which). > > After closing all but one of the files, GIMP was still using 27GB > virtual/25GB resident, and 79% of total RAM. I tried to decompose a layer > in the single remaining open file and got the following two error messages: > > Unable to run plug-in "decompose" > (/home/elle/code/gimplch/install/lib/gimp/2.0/plug-ins/decompose) > > Failed to fork (Cannot allocate memory) > Execution error for 'Decompose': > Failed to run plug-in "decompose" > > Closing GIMP and then restarting and reopening just the one file resulted > in much less RAM usage, and there was no problem with decomposing the layer. > > There are several RAM-related open bug reports, but all of them seem to be > about Windows and/or GIMP 2.8. > > Tying up all that memory means other applications sometimes don't have > enough temp space to function properly. For example I repeated the "open a > bunch of XCF files and close all but one" procedure to verify that it > really is a reproducible problem, and Thunderbird couldn't save a copy of > this email as a draft message. > > I think maybe GIMP (and/or GEGL?) really isn't releasing RAM when it > should. But maybe also I have some incompatible settings: > > 1. In System Resources in GIMP Preferences, I have the tile cache size set > to 15GB - too much? > > 2. I allocated 12GB as a dynamically expanding tmp file in fstab (tmpfs > /tmp tmpfs noatime,nodiratime,size=12G 0 0). > > 3. I use the following lines to start GIMP: > GEGL_USE_OPENCL=no > export GEGL_USE_OPENCL > GEGL_SWAP=RAM > export GEGL_SWAP > > Are the above three settings for RAM usage perhaps in conflict with one > another? > > Best, > Elle > > _______________________________________________ > gimp-developer-list mailing list > List address: gimp-developer-list@xxxxxxxxx > List membership: > https://mail.gnome.org/mailman/listinfo/gimp-developer-list > List archives: https://mail.gnome.org/archives/gimp-developer-list > _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
