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Even with the "scroll lock" option enabled for the Eclipse console, eventually it overfills and starts auto-scrolling on me.

Is there some way of increasing the capacity of the console so that it stores more lines? I wasn't able to find the option.

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  • Thank you, all. I kept looking under general and under Java, didn't think that this would be part of Run/Debug. My bad.
    – Uri
    Commented May 13, 2010 at 16:05
  • 6
    one thing i love about the pref window on eclipse, you can just type in a search in the top left , i can never remember where this stuff is buried, but if you type console , you can see (at least with my install CDT,galileo) that there is a limit setting for the build console as well as the run console as well as the CVS console:)
    – iondiode
    Commented May 14, 2010 at 21:06
  • @iondiode: That's right. The funny thing is, I looked for such a search window and didn't see it. Then I realized that I am so used to the mac and having it on the top-right, that I never noticed the text box above the tree on the left!
    – Uri
    Commented May 14, 2010 at 21:11
  • possible duplicate of adjusting eclipse console size
    – Steve Chambers
    Commented Nov 6, 2014 at 13:58

10 Answers 10

Reset to default
639

Under Window > Preferences, go to the Run/Debug > Console section, then you should see an option "Limit console output." You can uncheck this or change the number in the "Console buffer size (characters)" text box below.

(This is in Galileo, Helios CDT, Kepler, Juno, Luna, Mars, Neon, Oxygen and 2018-09)

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  • 209
    I can't believe this is my highest voted answer on SO. I memorised the C standard for nothing.
    – detly
    Commented Jun 26, 2013 at 21:54
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    Caution: Deactivating this option is unfortunately very buggy. Deactivating the limit causes all kinds of strange behaviour (Juno) with regard to memory. I would advise against it.
    – AndreasT
    Commented Jan 21, 2014 at 14:48
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    @detly That option is there in Helios too
    – Sudheer Kumar
    Commented Feb 18, 2014 at 4:13
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    If you do disable the limit, you are probably having memory problems because you never clear your console. Click the paper with the grey X on it once and a while.
    – Roger
    Commented Mar 28, 2014 at 20:06
  • 4
    @mapto Woohoo, my one-answer reputation farm continues!
    – detly
    Commented Jan 17, 2018 at 21:48
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Open the Windows > Preferences menu.

Expand the Run/Debug > Console preferences.

Set the Console buffer size (characters) to something much bigger. 2147383647 / ~2GB is the upper limit (or 1000000 / ~1MB in older releases). Or just uncheck the Limit console output.

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1
  • 1
    Upper limit is now 2147383647, about 2GB, as of Oxygen.1a Release (4.7.1a) Build id: 20171005-1200.
    – tyblu
    Commented Oct 15, 2017 at 20:31
24

For CDT users / C/C++ build, also adjust the setting

in Window > Preferences

under C/C++ > Build > Console (!)

(This time in number of lines.)

This also affects the "CDT Global Build Console".

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16

Alternative

If your console is not empty, right click on the Console area > Preferences... > change the value for the Console buffer size (characters) (recommended) or uncheck the Limit console output (not recommended):

enter image description here enter image description here

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  • This is currently the best answer because the menu structure (i.e. Window/Preferences) has changed since the date the question was answered
    – demongolem
    Commented Aug 5, 2020 at 13:04
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On the MAC OS X 10.9.5 and Eclipse Luna Service Release 1 (4.4.1), its not found under the Window menu, but instead under: Eclipse > Preferences > Run/Debug > Console.

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Window > Preferences, go to the Run/Debug > Console section >> "Limit console output.>>Console buffer size(characters):" (This option can be seen in Eclipse Indigo ,but it limits buffer size at 1,000,000 )

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1
  • Or click Cmd + ,
    – Mehraj Malik
    Commented Jun 12, 2023 at 11:46
3

Under Window > Preferences, go to the Run/Debug > Console section, then you should see an option "Limit console output." You can unchecked this or change the number in the "Console buffer size (characters)" text box below. Do Unchecked.

This is for the Eclipse like Galileo, Kepler, Juno, Luna, Mars and Helios.

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2

Please go through the below guidelines. Do the changes accordingly.

enter image description here

enter image description here

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0
1

For C++ users, to increase the Build console output size see here

ie Windows > Preference > C/C++ > Build > Console

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0

Eclipse has limit of 32000 characters per line. If you have, for example JSONObject, which you want to log into console, you won't succeed. You can't handle this with the checkbox. Tested

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