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Do sync before closeIntoReader when rolling generation to improve index performance #45765

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merged 4 commits into from
Aug 22, 2019
Merged

Do sync before closeIntoReader when rolling generation to improve index performance #45765

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624729e
Merge pull request #1 from elastic/master
dengweisysu Aug 21, 2019
9986233
do sync before closeIntoReader to make sure we move most of the data …
dengweisysu Aug 21, 2019
96e9741
modify comments in Translog.rollGeneration
dengweisysu Aug 21, 2019
113625b
Merge branch 'master' into master
elasticmachine Aug 21, 2019
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3 changes: 3 additions & 0 deletions server/src/main/java/org/elasticsearch/index/translog/Translog.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1641,6 +1641,9 @@ public TranslogGeneration getMinGenerationForSeqNo(final long seqNo) {
* @throws IOException if an I/O exception occurred during any file operations
*/
public void rollGeneration() throws IOException {
// make sure we move most of the data to disk outside of the writeLock
// in order to reduce the time the lock is held since it's blocking all threads
sync();
try (Releasable ignored = writeLock.acquire()) {
try {
final TranslogReader reader = current.closeIntoReader();
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