From d0de9ecac811fc4890e11c2a020d3ef8184e65e0 Mon Sep 17 00:00:00 2001
From: 761417898 <761417898@qq.com>
Date: Wed, 30 Sep 2026 16:09:54 +0800
Subject: [PATCH] Fix TTL expired data ratio in settle compaction

---
 .../compaction/selector/impl/SettleSelectorImpl.java         | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/selector/impl/SettleSelectorImpl.java b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/selector/impl/SettleSelectorImpl.java
index b08c032d483ce..61f8229cd3ca3 100644
--- a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/selector/impl/SettleSelectorImpl.java
+++ b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/selector/impl/SettleSelectorImpl.java
@@ -290,7 +290,7 @@ private FileDirtyInfo selectFileBaseOnDirtyData(TsFileResource resource)
             // overflow, like 100 - Long.MIN
             outdatedTimeDiff = Long.MAX_VALUE;
           }
-          long ttlThreshold = 3 * ttl > ttl ? ttl : Long.MAX_VALUE;
+          long ttlThreshold = ttl <= Long.MAX_VALUE / 3 ? 3 * ttl : Long.MAX_VALUE;
           hasExpiredTooLong =
               hasExpiredTooLong
                   || outdatedTimeDiff > Math.min(config.getMaxExpiredTime(), ttlThreshold);
@@ -309,7 +309,8 @@ private FileDirtyInfo selectFileBaseOnDirtyData(TsFileResource resource)
       return new FileDirtyInfo(DirtyStatus.FULLY_DIRTY, ttlTables);
     }
     hasExpiredTooLong = config.getMaxExpiredTime() != Long.MAX_VALUE && hasExpiredTooLong;
-    if (hasExpiredTooLong || deletedDeviceRatio >= config.getExpiredDataRatio()) {
+    if (hasExpiredTooLong
+        || (deletedDeviceRatio > 0 && deletedDeviceRatio >= config.getExpiredDataRatio())) {
       // evaluate dirty data size in the tsfile
       return new FileDirtyInfo(
           PARTIALLY_DIRTY, (long) (deletedDeviceRatio * resource.getTsFileSize()), ttlTables);