当计划无法放入IoTDB中的wal缓冲区时，如何设置wal_buffer_size

Question

当计划无法放入wal缓冲区时，IoTDB会抛出异常。但是，我不知道如何设置wal_buffer_size。

客户端：

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服务器：

Caused by: java.io.IOException: Log cannot fit into the buffer, please increase wal_buffer_sizeCaused by: java.io.IOException: Log cannot fit into the buffer, please increase wal_buffer_size at org.apache.iotdb.db.writelog.node.ExclusiveWriteLogNode.write(ExclusiveWriteLogNode.java:116) at org.apache.iotdb.db.engine.storagegroup.TsFileProcessor.insert(TsFileProcessor.java:197) ... 16 common frames omitted

Caused by: java.nio.BufferOverflowException: null at java.nio.DirectByteBuffer.put(DirectByteBuffer.java:363) at java.nio.ByteBuffer.put(ByteBuffer.java:859) at org.apache.iotdb.tsfile.utils.ReadWriteIOUtils.write(ReadWriteIOUtils.java:232) at org.apache.iotdb.db.qp.physical.crud.InsertRowPlan.putValues(InsertRowPlan.java:391) at org.apache.iotdb.db.qp.physical.crud.InsertRowPlan.serializeMeasurementsAndValues(InsertRowPlan.java:461) at org.apache.iotdb.db.qp.physical.crud.InsertRowPlan.subSerialize(InsertRowPlan.java:447) at org.apache.iotdb.db.qp.physical.crud.InsertRowPlan.serialize(InsertRowPlan.java:441) at org.apache.iotdb.db.writelog.node.ExclusiveWriteLogNode.putLog(ExclusiveWriteLogNode.java:130) at org.apache.iotdb.db.writelog.node.ExclusiveWriteLogNode.write(ExclusiveWriteLogNode.java:111) ... 17 common frames omitted

Answer 1

在最新版本中，当计划超出wal_buffer_size时，IoTDB将打印计划的实际大小。例如，Log cannot fit into the buffer, please increase wal_buffer_size to 16777216。

您可以查看服务器日志，并在iotdb-engine.properties中设置wal_buffer_size。