horizonzy opened a new issue #2563:
URL: https://github.com/apache/rocketmq/issues/2563
**BUG REPORT**
1. Please describe the issue you observed:
The code as follow:
```
protected void commit0(final int commitLeastPages) {
int writePos = this.wrotePosition.get();
int lastCommittedPosition = this.committedPosition.get();
if (writePos - lastCommittedPosition > commitLeastPages) {
try {
ByteBuffer byteBuffer = writeBuffer.slice();
byteBuffer.position(lastCommittedPosition);
byteBuffer.limit(writePos);
this.fileChannel.position(lastCommittedPosition);
this.fileChannel.write(byteBuffer);
this.committedPosition.set(writePos);
} catch (Throwable e) {
log.error("Error occurred when commit data to FileChannel.",
e);
}
}
}
```
` if (writePos - lastCommittedPosition > commitLeastPages)` should be
`if (writePos - lastCommittedPosition > commitLeastPages * OS_PAGE_SIZE)`
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