Difference between revisions of "Reducing memory usage"
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== Default MaxRAM Setting == | == Default MaxRAM Setting == | ||
| − | One of the settings java virtual machines use to calibrate how much physical memory to reserve at startup is '''MaxRAM''', and there is a good chance your JVM thinks it has more RAM to use than is installed on your machine. | + | One of the settings java virtual machines use to calibrate how much physical memory to reserve at startup is '''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 | java -XX:+UnlockDiagnosticVMOptions -XX:+PrintFlagsFinal -version | grep MaxRAM | ||
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Look for the default MaxRAM setting in the output; this machine says | Look for the default MaxRAM setting in the output; this machine says | ||
| − | 367: uint64_t MaxRAM | + | 367: uint64_t MaxRAM = 137438953472 |
meaning my OpenJDK 11 JVM's MaxRAM setting is 128 GB, on a machine with only 16 GB RAM. | meaning my OpenJDK 11 JVM's MaxRAM setting is 128 GB, on a machine with only 16 GB RAM. | ||
| Line 13: | Line 13: | ||
Experiments have shown running Bisq with a 4g (GB) MaxRAM setting reduces resident memory consumption by more than 50% (when starting a clean Bisq installation with an empty data directory). | Experiments have shown running Bisq with a 4g (GB) MaxRAM setting reduces resident memory consumption by more than 50% (when starting a clean Bisq installation with an empty data directory). | ||
| + | Setting MaxRAM to 2g reduces resident memory usage even more, but setting it any lower (1536m) will result in an OutOfMemoryError and crash the app. | ||
| − | |||
| − | As of version 1.2.7, Bisq | + | As of version 1.2.7, Bisq is started with a MaxRAM setting of 4g (GB). If you are using Bisq v1.2.6 or older, consider upgrading to the [https://bisq.network/downloads latest version] to benefit from this change. |
Revision as of 15:26, 5 April 2020
Default MaxRAM Setting
One of the settings java virtual machines use to calibrate how much physical memory to reserve at startup is 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
meaning my OpenJDK 11 JVM's MaxRAM setting is 128 GB, on a machine with only 16 GB RAM.
Experiments have shown running Bisq with a 4g (GB) MaxRAM setting reduces resident memory consumption by more than 50% (when starting a clean Bisq installation with an empty data directory).
Setting MaxRAM to 2g reduces resident memory usage even more, but setting it any lower (1536m) will result in an OutOfMemoryError and crash the app.
As of version 1.2.7, Bisq is started with a MaxRAM setting of 4g (GB). If you are using Bisq v1.2.6 or older, consider upgrading to the latest version to benefit from this change.
