Grakn 内存问题 windows 本地安装
Grakn mem issue windows local installation
我没有技术背景。我在 windows 本地将 grakn 安装到一个文件夹中，我能够启动服务器并使用工作库，但是当我尝试在文档教程 (social_network) 中执行计算查询时，它会抛出一个错误：
2020-08-18 16:59:33,614 [transaction-listener] ERROR g.c.s.r.SessionService$TransactionListener - Runtime Exception in RPC TransactionListener: java.lang.IllegalArgumentException: System memory 259522560 must be at least 471859200. Please increase heap size using the --driver-memory option or spark.driver.memory in Spark configuration.
然后我设置环境变量：
"SERVER_JAVAOPTS": -Xmx4G
"STORAGE_JAVAOPTS": -Xmx4G
结果：
Starting Storage....FAILED!
Unable to start Storage.
Process exited with code '1': 'Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Invalid maximum heap size: -Xmx4G
The specified size exceeds the maximum representable size.
An error has occurred during boot-up. Please run 'grakn server status' or check the logs located under the 'logs' directory.
Process exited with code '1': 'Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Invalid maximum heap size: -Xmx4G
The specified size exceeds the maximum representable size.
然后我设置环境变量：
"SERVER_JAVAOPTS": -Xmx2G
"STORAGE_JAVAOPTS": -Xmx2G
结果又是nok:
Starting Storage....FAILED!
Unable to start Storage.
Process exited with code '1': ''
An error has occurred during boot-up. Please run 'grakn server status' or check the logs located under the 'logs' directory.
Process exited with code '1': ''
然后我将环境变量设置为：
"SERVER_JAVAOPTS": -Xmx1G
"STORAGE_JAVAOPTS": -Xmx1G
现在结果还可以：
Starting Storage......SUCCESS
Starting Grakn Core Server.....SUCCESS
...但为什么我不能分配更多内存？我总共有 32GB，使用率约为 20%。
非常感谢。
这可能有两个原因：
- JVM 无法分配 4G RAM，因为它被其他东西占用了。但是，正如您所说，只使用了 20% 或 RAM，这是不太可能的原因。
- 32 位 JVM 无法寻址超过 4GB 的 RAM 1，因此您应该检查它是否适用于您，如果适用，请将您的 JVM 重新安装为 64 位。
我没有技术背景。我在 windows 本地将 grakn 安装到一个文件夹中，我能够启动服务器并使用工作库，但是当我尝试在文档教程 (social_network) 中执行计算查询时，它会抛出一个错误：
2020-08-18 16:59:33,614 [transaction-listener] ERROR g.c.s.r.SessionService$TransactionListener - Runtime Exception in RPC TransactionListener: java.lang.IllegalArgumentException: System memory 259522560 must be at least 471859200. Please increase heap size using the --driver-memory option or spark.driver.memory in Spark configuration.
然后我设置环境变量：
"SERVER_JAVAOPTS": -Xmx4G
"STORAGE_JAVAOPTS": -Xmx4G
结果：
Starting Storage....FAILED!
Unable to start Storage.
Process exited with code '1': 'Error: Could not create the Java Virtual Machine.Error: A fatal exception has occurred. Program will exit.
Invalid maximum heap size: -Xmx4G
The specified size exceeds the maximum representable size.An error has occurred during boot-up. Please run 'grakn server status' or check the logs located under the 'logs' directory.
Process exited with code '1': 'Error: Could not create the Java Virtual Machine.Error: A fatal exception has occurred. Program will exit.
Invalid maximum heap size: -Xmx4G
The specified size exceeds the maximum representable size.
然后我设置环境变量：
"SERVER_JAVAOPTS": -Xmx2G
"STORAGE_JAVAOPTS": -Xmx2G
结果又是nok:
Starting Storage....FAILED!
Unable to start Storage.
Process exited with code '1': ''An error has occurred during boot-up. Please run 'grakn server status' or check the logs located under the 'logs' directory.
Process exited with code '1': ''
然后我将环境变量设置为：
"SERVER_JAVAOPTS": -Xmx1G
"STORAGE_JAVAOPTS": -Xmx1G
现在结果还可以：
Starting Storage......SUCCESS
Starting Grakn Core Server.....SUCCESS
...但为什么我不能分配更多内存？我总共有 32GB，使用率约为 20%。 非常感谢。
这可能有两个原因：
- JVM 无法分配 4G RAM，因为它被其他东西占用了。但是，正如您所说，只使用了 20% 或 RAM，这是不太可能的原因。
- 32 位 JVM 无法寻址超过 4GB 的 RAM 1，因此您应该检查它是否适用于您，如果适用，请将您的 JVM 重新安装为 64 位。