Fix: jvm heap config #98
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Sunny6889
reviewed
Oct 15, 2025
single_node/README.md
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| Flags in `command` are used for java-tron start-up arguments: | ||
| - `-jvm` used for java virtual machine, the parameters must be enclosed in double quotes and braces. `"{-Xmx14g -Xms12g}"` sets the maximum and initial heap size to 14GB and 12GB respectively. If you want to set up a long run FullNode, please use the best practice jvm flags with `"{-Xmx14g -Xmn2g XX:ReservedCodeCacheSize=256m -XX:MetaspaceSize=256m -XX:MaxMetaspaceSize=512m -XX:MaxDirectMemorySize=1G -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:gc.log -XX:+UseConcMarkSweepGC -XX:NewRatio=2 -XX:+CMSScavengeBeforeRemark -XX:+ParallelRefProcEnabled -XX:+HeapDumpOnOutOfMemoryError -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70}"`. | ||
| - `-jvm` used for java virtual machine, the parameters must be enclosed in double quotes and braces. `"{-Xmx14g -Xms12g}"` sets the maximum and initial heap size to 14GB and 12GB respectively. If you want to set up a long run normal FullNode, please use the best practice jvm flags with `"{-Xms12g -Xmx12g XX:ReservedCodeCacheSize=256m -XX:MetaspaceSize=256m -XX:MaxMetaspaceSize=512m -XX:MaxDirectMemorySize=1G -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:gc.log -XX:+UseConcMarkSweepGC -XX:NewRatio=3 -XX:+CMSScavengeBeforeRemark -XX:+ParallelRefProcEnabled -XX:+HeapDumpOnOutOfMemoryError -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70}"`. If you want to set up a long run FullNode for producing blocks, please use the best practice jvm flags with `"{-Xms24g -Xmx24g XX:ReservedCodeCacheSize=256m -XX:MetaspaceSize=256m -XX:MaxMetaspaceSize=512m -XX:MaxDirectMemorySize=1G -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:gc.log -XX:+UseConcMarkSweepGC -XX:NewRatio=3 -XX:+CMSScavengeBeforeRemark -XX:+ParallelRefProcEnabled -XX:+HeapDumpOnOutOfMemoryError -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70}"` |
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-jvmused for java virtual machine, the parameters must be enclosed in double quotes and braces.-Xmx14g -Xms12gsets the maximum and initial heap sizes to 14 GB and 12 GB, respectively. For a long-running FullNode, use the recommended JVM flags:-Xms12g -Xmx12g -XX:NewRatio=3 -XX:ReservedCodeCacheSize=256m -XX:MetaspaceSize=256m -XX:MaxMetaspaceSize=512m -XX:MaxDirectMemorySize=1G -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:gc.log -XX:+UseConcMarkSweepGC -XX:+CMSScavengeBeforeRemark -XX:+ParallelRefProcEnabled -XX:+HeapDumpOnOutOfMemoryError -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70. For a FullNode started as a witness on Mainnet, use-Xms24g -Xmx24gwhile keeping the rest same.
Sunny6889
approved these changes
Oct 15, 2025
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