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The 90% Memory Warning

by Jon (Updated on 2015-10-13)


Why does this happen?

The Java runtime reserves a chunk of memory for Stencyl to use before launching -- it can't be raised after the fact. If you exceed this limit, Stencyl locks up.

So why not just set the limit very high? It causes machines with less memory to fail to launch Stencyl at all.

Although we are working to reduce memory usage and plug leaks, there are large games for which having the higher memory usage is useful. This guide explains how you can raise the limit.

Common Misconception: The 90% memory warning has nothing to do with how much RAM your computer has. You could have 128 GB of RAM and still hit this since Java's upper cap sits around 4 GB and on some systems, may be as low as 2 GB.

How to Raise the Memory Limit (Windows)

  1. Install the 64-bit version (x64) of Java 8 to your computer.

  2. Download one of the following scripts and place it into your Stencyl installation directory. (For best results, go lower than what you have -- e.g. If you have 4 GB, choose the 2 or 3 GB option.)

  3. Double-click the script to launch Stencyl from now on.

Note 1: If Stencyl fails to launch, choose a script with a lower amount of memory.

Note 2:Note: The -Xmx setting in the script may be overridden by the _JAVA_OPTIONS environment variable. See this tutorial for how to delete the variable.

How to Raise the Memory Limit (Mac)

  1. Right-click the Stencyl.app bundle and pick Show Package Contents.

  2. Using a text editor, open up Contents/MacOS/Stencyl.

  3. Search for -Xmx1536m and change the number to something higher such as 3072 (which would be 3 GB).

  4. Save the file, then relaunch Stencyl. (If your Mac complains that the app is "damaged", go to System Preferences > Security and Privacy and allow apps to be downloaded from Anywhere.)

Note: If Stencyl fails to launch after you make an edit, your number is too high. Try something smaller such as 2048.

How to Raise the Memory Limit (Linux)

  1. Edit the Stencyl shell script.

  2. Change the part that looks like -Xmx1024m to a higher number such as 3072 (which would be 3 GB).

Note: If Stencyl fails to launch after you make an edit, your number is too high. Try something smaller such as 2048 or 3072.

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Disclaimer: Use comments to provide feedback and point out issues with the article (typo, wrong info, etc.). If you're seeking help for your game, please ask a question on the forums. Thanks!

45 Comments

BMJ
For people trying to use the files that ShakeTelevision shared -- these are good (it's what works for me), but you need to get rid of the space in the middle of the word "swing". It shouldn't be there and it won't work unless you edit the file to remove that space.
0 3 weeks, 3 days ago
ShakeTelevision
For those unable to get to the links (2,3,4,6,8Gb for Windows), try the wayback machine instead. Works there...
https://web.archive.org/web/2016091 6085705/http://www.stencyl.com:80/h elp/view/ninety-percent-warning

And just incase, here they are listed below. (Do not include "2Gb", "3Gb", etc in the script, as they are just titles I've added to break them up.) See the links on the wayback machine above. See BMJs comment for what to do with it.

2Gb
java^
-Xms64m^
-Xmx2048m^
-XX:CompileCommand=exclude,javax/sw ing/text/GlyphView,getBreakSpot^
-XX:-OmitStackTraceInFastThrow^
-jar sw.jar

3Gb
java^
-Xms64m^
-Xmx3072m^
-XX:CompileCommand=exclude,javax/sw ing/text/GlyphView,getBreakSpot^
-XX:-OmitStackTraceInFastThrow^
-jar sw.jar

4Gb
java^
-Xms64m^
-Xmx4096m^
-XX:CompileCommand=exclude,javax/sw ing/text/GlyphView,getBreakSpot^
-XX:-OmitStackTraceInFastThrow^
-jar sw.jar

6Gb
java^
-Xms64m^
-Xmx6144m^
-XX:CompileCommand=exclude,javax/sw ing/text/GlyphView,getBreakSpot^
-XX:-OmitStackTraceInFastThrow^
-jar sw.jar

8Gb
java^
-Xms64m^
-Xmx8192m^
-XX:CompileCommand=exclude,javax/sw ing/text/GlyphView,getBreakSpot^
-XX:-OmitStackTraceInFastThrow^
-jar sw.jar

1 1 month, 3 weeks ago
Anonymous0038
Never mind what I said previously, because I think I might know what to do now, but I have just one problem...I have 1GB...1GB! These scripts aren't going to help anymore are they? Because I tried the lowest of 2GB and it still didn't work.
0 4 months, 3 weeks ago
Anonymous0038
The links for Windows didn't download anything. It just led me to the code of it. And also, this isn't explained in such a way that can be easily understood. We need some pictures or at least a demonstration video to help guide other people who are having the same problem.
0 5 months, 1 week ago
BMJ
Amendment to my last comment: Instead of copying/pasting, you can also just right-click the link to the batch file and select "Save link as" (it might also be called "Save target as"), but you can't save it directly to the Progam Files (x86) ----> Stencyl folder. Save it somewhere else and move it there. (I don't know why.)
0 5 months, 1 week ago
BMJ
For Windows users who are wondering how to use these batch files:

Click on the link to one of the batch files -- either 2 GB, 4 GB, 6 GB or 8 GB. When the new tab opens up. Highlight and copy the text. Paste it into Notepad and save it with the extension ".bat". Move that file into the directory that has the Stencyl application in it (usually it's Program Files (x86) -----> Stencyl. After moving it into this directory, double-click the batch file and it should run Stencyl with the correct amount of memory specified in the batch file. You may need to "run as administrator" the first time. I recommend right-clicking the batch file and creating a shortcut on your desktop.

0 5 months, 1 week ago
TigerrrrUppercut
Total noob here but also running into this issue on Windows 10, Java 8 Update 131 x64. Attempted all the above scripts, none opened the program (had to run Chrome as admin to be able to download to C:\Program Files (x86)\Stencyl), also attempted to Run As Admin.

Happy to send along logs and any other info, and looking forward to any help I can get, super excited to get into Ludum Dare!

0 7 months, 4 days ago
Peter P
CAN SOMEONE THAT WORKS THERE JUST PUT UP A YOUTUBE VIDEO ON HOW TO FIX?????
0 9 months, 3 weeks ago
ProbeGames
Im really so dissapointed with this and the lack of clear instructions. ive had a couple of games released on android and google play store and this is preventing me from updating or making any more games. i love stencyl as a platform but this and the lack of instructions on how to sort it is terrible. i mean im realy so dissappointed. will be trying to find a new platform now
0 11 months, 2 weeks ago
MrGreenBean
I'm running Mac OSX 10.12 (Sierra) and it says 'You can only read' under the sharing and permissions tab in 'get info' even though under the privilege column it says I have read and write permissions. Any ideas? I'm trying to add a 100 kb .png image as a background and I'm getting a storage is full error and then everything freezes. I've tried using Text Edit and Terminal..
0 11 months, 3 weeks ago

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