diff --git a/velox/common/file/FileInputStream.cpp b/velox/common/file/FileInputStream.cpp
index 73fdb2692c24..e680733c637b 100644
--- a/velox/common/file/FileInputStream.cpp
+++ b/velox/common/file/FileInputStream.cpp
@@ -56,9 +56,9 @@ void FileInputStream::readNextRange() {
   current_ = nullptr;
 
   int32_t readBytes{0};
-  uint64_t readTimeUs{0};
+  uint64_t readTimeNs{0};
   {
-    MicrosecondTimer timer{&readTimeUs};
+    NanosecondTimer timer{&readTimeNs};
     if (readAheadWait_.valid()) {
       readBytes = std::move(readAheadWait_)
                       .via(&folly::QueuedImmediateExecutor::instance())
@@ -72,7 +72,7 @@ void FileInputStream::readNextRange() {
       readBytes = readSize();
       VELOX_CHECK_LT(
           0, readBytes, "Read past end of FileInputStream {}", fileSize_);
-      MicrosecondTimer timer{&readTimeUs};
+      NanosecondTimer timer{&readTimeNs};
       file_->pread(fileOffset_, readBytes, buffer()->asMutable<char>());
     }
   }
@@ -82,7 +82,7 @@ void FileInputStream::readNextRange() {
   current_ = ranges_.data();
   fileOffset_ += readBytes;
 
-  updateStats(readBytes, readTimeUs);
+  updateStats(readBytes, readTimeNs);
 
   maybeIssueReadahead();
 }
@@ -222,9 +222,9 @@ void FileInputStream::maybeIssueReadahead() {
   VELOX_CHECK(readAheadWait_.valid());
 }
 
-void FileInputStream::updateStats(uint64_t readBytes, uint64_t readTimeUs) {
+void FileInputStream::updateStats(uint64_t readBytes, uint64_t readTimeNs) {
   stats_.readBytes += readBytes;
-  stats_.readTimeUs += readTimeUs;
+  stats_.readTimeNs += readTimeNs;
   ++stats_.numReads;
 }
 
@@ -243,15 +243,15 @@ FileInputStream::Stats FileInputStream::stats() const {
 
 bool FileInputStream::Stats::operator==(
     const FileInputStream::Stats& other) const {
-  return std::tie(numReads, readBytes, readTimeUs) ==
-      std::tie(other.numReads, other.readBytes, other.readTimeUs);
+  return std::tie(numReads, readBytes, readTimeNs) ==
+      std::tie(other.numReads, other.readBytes, other.readTimeNs);
 }
 
 std::string FileInputStream::Stats::toString() const {
   return fmt::format(
-      "numReads: {}, readBytes: {}, readTimeUs: {}",
+      "numReads: {}, readBytes: {}, readTimeNs: {}",
       numReads,
       succinctBytes(readBytes),
-      succinctMicros(readTimeUs));
+      succinctMicros(readTimeNs));
 }
 } // namespace facebook::velox::common
diff --git a/velox/common/file/FileInputStream.h b/velox/common/file/FileInputStream.h
index 4d9b7d83b9ac..6daf9f84e109 100644
--- a/velox/common/file/FileInputStream.h
+++ b/velox/common/file/FileInputStream.h
@@ -63,7 +63,7 @@ class FileInputStream : public ByteInputStream {
   struct Stats {
     uint32_t numReads{0};
     uint64_t readBytes{0};
-    uint64_t readTimeUs{0};
+    uint64_t readTimeNs{0};
 
     bool operator==(const Stats& other) const;
 
@@ -106,7 +106,7 @@ class FileInputStream : public ByteInputStream {
     return buffers_[nextBufferIndex()].get();
   }
 
-  void updateStats(uint64_t readBytes, uint64_t readTimeUs);
+  void updateStats(uint64_t readBytes, uint64_t readTimeNs);
 
   const std::unique_ptr<ReadFile> file_;
   const uint64_t fileSize_;
diff --git a/velox/common/file/tests/FileInputStreamTest.cpp b/velox/common/file/tests/FileInputStreamTest.cpp
index 74cf27de55e0..18ab5733900e 100644
--- a/velox/common/file/tests/FileInputStreamTest.cpp
+++ b/velox/common/file/tests/FileInputStreamTest.cpp
@@ -96,7 +96,7 @@ TEST_F(FileInputStreamTest, stats) {
     ASSERT_EQ(
         byteStream->stats().readBytes,
         std::min(testData.streamSize, testData.bufferSize));
-    ASSERT_GE(byteStream->stats().readTimeUs, 0);
+    ASSERT_GT(byteStream->stats().readTimeNs, 0);
     uint8_t buffer[testData.streamSize / 8];
     for (int offset = 0; offset < testData.streamSize;) {
       byteStream->readBytes(buffer, testData.streamSize / 8);
@@ -110,6 +110,6 @@ TEST_F(FileInputStreamTest, stats) {
         bits::roundUp(testData.streamSize, testData.bufferSize) /
             testData.bufferSize);
     ASSERT_EQ(byteStream->stats().readBytes, testData.streamSize);
-    ASSERT_GE(byteStream->stats().readTimeUs, 0);
+    ASSERT_GT(byteStream->stats().readTimeNs, 0);
   }
 }
diff --git a/velox/exec/SpillFile.cpp b/velox/exec/SpillFile.cpp
index 8aaf6a2f86d5..0d16005b20f4 100644
--- a/velox/exec/SpillFile.cpp
+++ b/velox/exec/SpillFile.cpp
@@ -328,13 +328,10 @@ void SpillReadFile::recordSpillStats() {
   VELOX_CHECK(input_->atEnd());
   const auto readStats = input_->stats();
   common::updateGlobalSpillReadStats(
-      readStats.numReads,
-      readStats.readBytes,
-      readStats.readTimeUs * Timestamp::kNanosecondsInMicrosecond);
+      readStats.numReads, readStats.readBytes, readStats.readTimeNs);
   auto lockedSpillStats = stats_->wlock();
   lockedSpillStats->spillReads += readStats.numReads;
-  lockedSpillStats->spillReadTimeNanos +=
-      readStats.readTimeUs * Timestamp::kNanosecondsInMicrosecond;
+  lockedSpillStats->spillReadTimeNanos += readStats.readTimeNs;
   lockedSpillStats->spillReadBytes += readStats.readBytes;
 }
 } // namespace facebook::velox::exec