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databasetime-seriesquestdb

Java Heap Space when running QuestDB on Docker

I am running QuestDB 8.1.4 with default parameters via Docker. I can see the message Java Heap Space, 36, ERROR appearing frequently on the logs.

Once the error happens all other processes are stuck and I need to restart the DB.

I should have plenty of memory, as the host has 384GB of RAM, but the QuestDB container seems to be ignoring that.

How can I increase the memory available for QuestDB?

Solution

  • The Docker entry file for the QuestDB official image has a setting to prepend parameters to the JVM.

    It should be possible to increase heap memory available by doing something like

    docker run -e JVM_PREPEND="-Xmx30g" questdb/questdb

    On startup, one of the first log lines of the container should inform that the setting was found and passed to the JVM.