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Core: remove per-ID locking when ID was auto-generated 

When we know the ID for the document we are about to index was
auto-generated, we don't need to acquire/release the per-ID lock,
which might provide small speedups during highly concurrent indexing.

Closes #6584
This commit is contained in:
mikemccand 2014-07-07 11:34:46 -04:00
parent ec92646289
commit 15b81c91f7
1 changed files with 43 additions and 39 deletions
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14
src/main/java/org/elasticsearch/index/engine/internal/InternalEngine.java
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@ -402,13 +402,13 @@ public class InternalEngine extends AbstractIndexShardComponent implements Engin
}
private void innerCreate(Create create, IndexWriter writer) throws IOException {
if (optimizeAutoGenerateId && create.autoGeneratedId() && !create.canHaveDuplicates()) {
// We don't need to lock because this ID cannot be concurrently updated:
innerCreateNoLock(create, writer, Versions.NOT_FOUND, null);
} else {
synchronized (dirtyLock(create.uid())) {
final long currentVersion;
final VersionValue versionValue;
if (optimizeAutoGenerateId && create.autoGeneratedId() && !create.canHaveDuplicates()) {
currentVersion = Versions.NOT_FOUND;
versionValue = null;
} else {
versionValue = versionMap.getUnderLock(create.uid().bytes());
if (versionValue == null) {
currentVersion = loadCurrentVersionFromIndex(create.uid());
@ -419,7 +419,12 @@ public class InternalEngine extends AbstractIndexShardComponent implements Engin
currentVersion = versionValue.version();
}
}
innerCreateNoLock(create, writer, currentVersion, versionValue);
}
}
}
private void innerCreateNoLock(Create create, IndexWriter writer, long currentVersion, VersionValue versionValue) throws IOException {
// same logic as index
long updatedVersion;
@ -464,7 +469,6 @@ public class InternalEngine extends AbstractIndexShardComponent implements Engin
indexingService.postCreateUnderLock(create);
}
}
@Override
public void index(Index index) throws EngineException {