Github user parthchandra commented on a diff in the pull request:
https://github.com/apache/drill/pull/723#discussion_r98289478
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/util/filereader/DirectBufInputStream.java
---
@@ -81,7 +87,15 @@ public synchronized int read(DrillBuf buf, int off, int
len) throws IOException
ByteBuffer directBuffer = buf.nioBuffer(0, len);
int lengthLeftToRead = len;
while (lengthLeftToRead > 0) {
- lengthLeftToRead -= CompatibilityUtil.getBuf(getInputStream(),
directBuffer, lengthLeftToRead);
+ logger.trace("PERF: Disk read start. {}, StartOffset: {},
TotalByteSize: {}", this.streamId,
+ this.startOffset, this.totalByteSize);
+ Stopwatch timer = Stopwatch.createStarted();
+ int bytesRead = CompatibilityUtil.getBuf(getInputStream(),
directBuffer, lengthLeftToRead);
+ lengthLeftToRead -= bytesRead;
+ logger.trace(
--- End diff --
Done
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