- Full of thousands of files?
- On a network?
Slow or Laggy Matlab Workspace
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Matlab has become unusually unresponsive when I allow it to sit for some time (a few hours to a few days). The type of slowness I'm referring to is simply that the command window, variable editor and code editor are almost non-responsive. A click to activate one of the windows will take 10-30 seconds to respond, rendering the application useless.
I have just over 1GB worth of variables loaded into my workspace but this pales in comparison to the power of my machine (48Gb of RAM and 24 processors). I also have the java heap space turned up to 2.5 GB but still consistently receive a laggy Matlab, even when no variables are open in the editor and no plots have been drawn.
Just to note - as I click the X to close Matlab, even though I have not even opened a code window and Matlab has been sitting idle for 2+ hours - I get the message "An operation is in progress. If the operation does not finish in 20 seconds, Matlab will stop the operation and exit."
ver details - Matlab 2014B 64 bit (v 8.4) Windows 7 Professional V6.1 SP1 Java Version: Java 1.7.0_11-b21 with Oracle Corp Java Hotspot - 64-Bit Server VM mixed mode.
Thanks in advance for your help, Brian
Sean de Wolski on 7 Jan 2015
Is your current directory either:
These two reasons are often the cause of lag because MATLAB needs to refresh the path every time it displays the command window.
More Answers (4)
Jon on 25 Sep 2017
Edited: Jon on 25 Sep 2017
I've been having a similar issue with my 2011b installation where it suddenly became very slow to switch between the Editor and the Command Window, and slow to execute any command from the Command Window. GUIs and figures still responded normally. I tried the solution mentioned above with no effect. My issue ended up being the 'Command History' which I never remember clearing before. Once it was cleared the Command Window started responding immediately again.
Eduardo Gil on 25 Nov 2018
Thanks Sean, you deserve a medal. I am running a 1,000 lines matlab code using Spreadsheet link to exchange data between Excel and Matlab - and all of a sudden the exchange of data between Excel and Matlab starts to run unusually slow. The code runs in 60 seconds. I move the spreadsheet and the matlab code to C: drive - now it runs in 2.5 seconds. It's the freaking network.
Rtf on 7 Apr 2022
Hi I am having the same problem here and I can not use a local drive because I have to work on a network drive. This is so disapointing and frustrating... Sometimes I need to wait 30 seconds or more for the editor or the comand line to repond again and this is almost happening all the time!! Please is there any solution to that?