From 6967d2640b8a15dd8ded92592c89e70a0baccfee Mon Sep 17 00:00:00 2001
From: hzcheng <hzcheng@taosdata.com>
Date: Thu, 7 May 2020 14:49:45 +0800
Subject: [PATCH] fix retention error

---
 src/tsdb/src/tsdbFile.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tsdb/src/tsdbFile.c b/src/tsdb/src/tsdbFile.c
index b1228b0230..ad98bb7b20 100644
--- a/src/tsdb/src/tsdbFile.c
+++ b/src/tsdb/src/tsdbFile.c
@@ -178,7 +178,7 @@ void tsdbFitRetention(STsdbRepo *pRepo) {
   SFileGroup *pGroup = pFileH->fGroup;
 
   int mfid =
-      tsdbGetKeyFileId(taosGetTimestamp(pRepo->config.precision), pRepo->config.daysPerFile, pRepo->config.precision);
+      tsdbGetKeyFileId(taosGetTimestamp(pRepo->config.precision), pRepo->config.daysPerFile, pRepo->config.precision) - pFileH->maxFGroups + 3;
 
   while (pFileH->numOfFGroups > 0 && pGroup[0].fileId < mfid) {
     tsdbRemoveFileGroup(pFileH, pGroup[0].fileId);
-- 
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