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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== 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 | + | 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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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. | ||
| − | Experiments | + | Experiments have shown starting 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. |
| − | As of version 1.2.7, Bisq starts up with a MaxRAM setting of | + | 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 starts up with a MaxRAM setting of 4g (GB). If you are using Bisq v1.2.6 or older, consider upgrading to the latest version to reduce Bisq's RAM usage. | ||
Revision as of 17:15, 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 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 have shown starting 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 starts up with a MaxRAM setting of 4g (GB). If you are using Bisq v1.2.6 or older, consider upgrading to the latest version to reduce Bisq's RAM usage.
