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After some hours after playing Minecraft or another game in 16.10, all the RAM and swap gets filled by an invisible process, and the system freezes with HDD LED on, so it's writing something to the SSD, but nothing happens, and I need to force shutdown and then restart the computer.

To understand these issues, refer to the below screenshots.

pic 1

pic 2

Here are two screenshots without Chrome and Java, adding the values on the first picture, it's not 1.7GB. I think some hidden process causes this.

enter image description here

enter image description here

karel
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UDPSend
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  • You don't have much RAM (2GB?) and play Minecraft. That explains everything. Try to use oracle java 8, Minecraft tends to create memory leaks with openjdk. – mondjunge Nov 03 '16 at 10:04
  • It has 4GB, and 4GB swap, java version is:

    java version "1.8.0_111" Java(TM) SE Runtime Environment (build 1.8.0_111-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)

    Under OS X and Windows, i had no problems like this... :/

     – UDPSend Nov 03 '16 at 10:08
  • Your problem is a memory leak of some kind: RAM gets fuller and fuller until is is swapped to disk and also the swap partition is full, then your Desktop freezes cause you are out of memory and swap. Your goal should be to find out which program is creating a memory leak , why and fix it. – mondjunge Nov 03 '16 at 10:15
  • http://stackoverflow.com/questions/143791/how-do-i-find-which-process-is-leaking-memory – mondjunge Nov 03 '16 at 10:18
  • Yes, i know this... But can't find it, see first picture, all of the processes RAM usage is not 8gb, java is 1.3gb, chrome is 600-700mb, and where is the more 6gb? – UDPSend Nov 03 '16 at 10:19
  • @USPSend: Please read the full texts on answers and try to understand them, ask if you don't. This is the vital part for you: "Select View - All Processes, go to Edit - Preferences and enable Virtual Memory column." , you get an extra column, showing the virtual memory a process uses, take alook at my system monitor where I did this: http://imgur.com/a/29PSj – mondjunge Nov 03 '16 at 10:39
  • @mondjunge Thanks, looks like gnome-shell does it. http://imgur.com/a/jE1Tj – UDPSend Nov 03 '16 at 11:04
  • I found an answer that's linking gnome shell memory leaks to extensions. Try to disable gnome-shell extensions you installed until you find the one that creates the memory leak. http://askubuntu.com/questions/557088/gnome-14-10-memory-leak-over-5gb-of-gnome-shell – mondjunge Nov 03 '16 at 11:53
  • Run top -o %MEM in a terminal - does it give any other info as to what is using memory ? Minecraft has a tendency to use more and more memory over time - maybe just quit and reopen it from time to time ? – Jonas Czech Nov 03 '16 at 15:00
  • @JonasCz Looks like java does it, but on OS X and Windows, that was not problem... But Minecraft ingame shows 300mb, top command 5gb, what the hell? – UDPSend Nov 03 '16 at 15:44
  • Minecraft is sometimes just buggy, maybe that's why it shows you 300mb - make sure you have the latest version of both Java & the game. What graphics card & graphics drivers are you using ? – Jonas Czech Nov 03 '16 at 15:57
  • Intel HD3000 with default drivers, 60+ fps everywhere. – UDPSend Nov 03 '16 at 16:12

1 Answers1

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Chrome can use a lot of RAM

When Chrome window has focus press Shift>+Esc to bring up process manager:

enter image description here

I've ententionally narrowed the Task name width to hide my gmail inbox name but you can see it is using over 400 MB of RAM. In this screen Chrome is using 1.7 GB of RAM simply surfing the net with 10 Tabs opened.

Your screen only shows the Chrome name but this screen shows each opened Tab name to track down the offender. In my case if I wanted to free up RAM I would close gamil.com.

The second large RAM user is Earth-Sunrise website that has a comment section. Some websites with comment sections can burn up lots of RAM, in testing over 1 GB per tab over a few hours. Simpy refreshing the Tab brings the usage back down to ~100 MB.

Display JAVA Memory Usage

The tool VisualVM will display Java memory usage and other information:

Java RAM Usage

You can download it from github: (VisualVM)

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