From d603b0e8f02eac1db41ef1c30cd8d7a41521e797 Mon Sep 17 00:00:00 2001
From: BradLee <entropylee@gmail.com>
Date: Thu, 22 Jul 2021 18:43:44 +0800
Subject: [PATCH] Fix:avoid useless space allocation in SetBit

---
 src/redis_bitmap.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/redis_bitmap.cc b/src/redis_bitmap.cc
index da6e3abf1d2..7e8a95bd8b0 100644
--- a/src/redis_bitmap.cc
+++ b/src/redis_bitmap.cc
@@ -106,6 +106,8 @@ rocksdb::Status Bitmap::SetBit(const Slice &user_key, uint32_t offset, bool new_
     size_t expand_size;
     if (byte_index >= value.size() * 2) {
       expand_size = byte_index - value.size() + 1;
+    } else if (value.size() * 2 > kBitmapSegmentBytes) {
+       expand_size = kBitmapSegmentBytes - value.size();
     } else {
       expand_size = value.size();
     }