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Java OOM error

Hardware
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  • jeremyh

    Hi there,

    I have a test install of Mango 3.1.1 running in an AWS t2.micro (free tier) instance, with 512MB memory. Approx every week or so Mango will crash because Java runs out of memory:

    Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007f65c452d000, 12288, 0) failed; error='Cannot allocate memory' (errno=12)
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 12288 bytes for committing reserved memory.
# An error report file with more information is saved as:
# /opt/mango/hs_err_pid25504.log

    I am running Ubuntu 14.04.05 LTS with:

    # JRE version: Java(TM) SE Runtime Environment (8.0_111-b14) (build 1.8.0_111-b14)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.111-b14 mixed mode linux-amd64 compressed oops)

    Is there any suggested way I can configure Java (or Mango) so that it runs more happily on this server?

    I should also add that I am running another application on this server (a PHP-based network monitor called LibreNMS) which I'm sure is not helping things.

    Thanks!

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  • JoelHaggar

    Two things that might help.

    1. Go to the Internal Metrics page and check to see how much memory Mango has to work with.

    2. you can use a start up extension: https://help.infiniteautomation.com/using-startup-extensions/ to assign more memory to Mango. You have to be careful as the OS needs memory too and with only 512 mb ram you don't have much to play with. I would normally use a minimum of 1gb of ram and we have many Amazon installs like this running fine.

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  • jeremyh

    Great, thanks Joel – I'll check that out. Mango reports that the JVM free memory is 144 MB and JVM maximum available memory is 241 MB.

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