Difference between revisions of "Reducing memory usage"
(Created page with "== Default MaxRAM Setting == One of the settings java virtual machines use to calibrate how much physical memory to reserve at startup is called MaxRAM, and there is a good c...") |
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Revision as of 17:03, 4 April 2020
Default MaxRAM Setting
One of the settings java virtual machines use to calibrate how much physical memory to reserve at startup is called MaxRAM, and there is a good chance your JVM thinks it has more RAM to use than is installed on your machine. To check the default MaxRAM setting, run this java 'version' command:
java -XX:+UnlockDiagnosticVMOptions -XX:+PrintFlagsFinal -version | grep MaxRAM
Look for the default MaxRAM setting in the output; this machine says
367: uint64_t MaxRAM = 137438953472 {pd product} {default}
meaning my OpenJDK 11 JVM's MaxRAM setting is 128 GB, on a machine with only 16 GB RAM.
Experiments has shown that starting Bisq with a 4GB MaxRAM setting more than halves the resident memory consumption when starting a clean Bisq installation (with an empty data directory). Setting MaxRAM = 2GB reduces resident memory usage even more, but setting it any lower (1.5GB) will result in an OutOfMemoryError and crash the app.
As of version 1.2.7, Bisq starts up with a MaxRAM setting of 4GB.
