Add comments

guojialiang92 · guojialiang92 · commit 0cf905181cca · 2026-01-27T14:23:01.000+08:00
Signed-off-by: guojialiang &lt;guojialiang.2012@bytedance.com&gt;
diff --git a/server/src/main/java/org/opensearch/index/shard/IndexShard.java b/server/src/main/java/org/opensearch/index/shard/IndexShard.java
@@ -399,6 +399,8 @@ Runnable getGlobalCheckpointSyncer() {
     private final ReferencedSegmentsPublisher referencedSegmentsPublisher;
     private final Set<MergedSegmentCheckpoint> pendingMergedSegmentCheckpoints = Sets.newConcurrentHashSet();
     private final MergedSegmentTransferTracker mergedSegmentTransferTracker;
+
+    // Used to limit the number of concurrent translog tasks. When the semaphore is exhausted, serial recovery is used.
     private static final Semaphore translogConcurrentRecoverySemaphore = new Semaphore(1000);
 
     @InternalApi
