diff --git a/tools/dcompact/dcompact_worker.cpp b/tools/dcompact/dcompact_worker.cpp
index 6084fc5..13156c6 100644
--- a/tools/dcompact/dcompact_worker.cpp
+++ b/tools/dcompact/dcompact_worker.cpp
@@ -1091,6 +1091,7 @@ int RunCompact(FILE* in) const {
     WARN("env TOPLINGDB_CACHE_SST_FILE_ITER is true, sst would not be closed asap!");
   }
   mut_dbo.max_open_files = 1; // capacity is not strict
+  ROCKS_LOG_DEBUG(info_log, "Initialize workspace VersionSet");
   shared_ptr<Cache> table_cache = NewLRUCache(mut_dbo.max_open_files);
   BlockCacheTracer* block_cache_tracer = nullptr;
   const std::shared_ptr<IOTracer> io_tracer(nullptr);
@@ -1156,6 +1157,7 @@ int RunCompact(FILE* in) const {
                   &edit, &mutex, null_dbdir, new_descriptor_log, &cfo);
     VERIFY_STATUS_OK(s);
   }
+  ROCKS_LOG_DEBUG(info_log, "Add compaction input SSTs to VersionSet");
   auto cfd = versions->GetColumnFamilySet()->GetColumnFamily(params.cf_id);
   VERIFY_S(nullptr != cfd, "cf: id = %d name = %s", params.cf_id, params.cf_name);
   VERIFY_S_EQ(params.cf_name, cfd->GetName());
@@ -1194,6 +1196,7 @@ int RunCompact(FILE* in) const {
         onelevel.level, attempt_dbname, params.DebugString());
     onelevel.files = std::move(populated_files);
   }
+  ROCKS_LOG_DEBUG(info_log, "Construct Compaction object");
   std::string trim_ts = "";
   Compaction compaction(storage_info,
       *cfd->ioptions(), *cfd->GetLatestMutableCFOptions(), mut_dbo, inputs,
@@ -1231,6 +1234,7 @@ int RunCompact(FILE* in) const {
   std::atomic<bool> manual_compaction_canceled{false};
 #endif
   BlobFileCompletionCallback* blob_callback = nullptr;
+  ROCKS_LOG_DEBUG(info_log, "Construct CompactionJob object");
   CompactionJob compaction_job(
       params.job_id, &compaction, imm_dbo, mut_dbo, file_options,
       versions.get(),
@@ -1260,6 +1264,7 @@ int RunCompact(FILE* in) const {
     #endif
       blob_callback);
 
+  ROCKS_LOG_DEBUG(info_log, "Calling compaction_job.Prepare()");
   compaction_job.Prepare();
   MutexUnlock();
   VERIFY_S_EQ(compaction.GetSmallestUserKey(), params.smallest_user_key);
@@ -1273,8 +1278,10 @@ int RunCompact(FILE* in) const {
       input_version->props_of_all_tables_[std::move(fpath)] = props;
     }
   }
+  ROCKS_LOG_DEBUG(info_log, "Calling ShowCompactionParams() for start");
   const std::string start_time = StrDateTimeNow();
   ShowCompactionParams(params, cfd->current(), cfd, &start_time);
+  ROCKS_LOG_DEBUG(info_log, "Calling compaction_job.Run()");
   {
     Status s1 = compaction_job.Run();
     IOStatus s2 = compaction_job.io_status();
@@ -1313,6 +1320,7 @@ auto writeObjResult = [&]{
     SetResultSerDe1(cfo, table_properties_collector_factories[i]);
   }
 };
+  ROCKS_LOG_DEBUG(info_log, "Collecting compaction result");
   vector<vector<const FileMetaData*> > output_files;
   compaction_job.GetSubCompactOutputs(&output_files);
   results->output_files.resize(output_files.size());
@@ -1342,6 +1350,7 @@ auto writeObjResult = [&]{
   imm_dbo.statistics->GetAggregated(results->statistics.tickers,
                                     results->statistics.histograms);
   auto t1 = pf.now();
+  ROCKS_LOG_DEBUG(info_log, "Writing rpc.result");
   results->work_time_usec = pf.us(t0, t1);
   try {
     string outFname = MakePath(attempt_dir, "rpc.results");
@@ -1365,6 +1374,7 @@ auto writeObjResult = [&]{
   fclose(out); // must close before write compact_done_file
   //INFO("after fclose(out)");
   auto t2 = pf.now();
+  ROCKS_LOG_DEBUG(info_log, "Calling compaction_job.Install()");
   {
     MutexLock();
     Status s = compaction_job.Install(*cfd->GetLatestMutableCFOptions());
@@ -1384,8 +1394,10 @@ auto writeObjResult = [&]{
   // compact end time
   auto t3 = pf.now();
   const std::string end_time = StrDateTimeNow();
+  ROCKS_LOG_DEBUG(info_log, "Calling ShowCompactionParams() for end");
   ShowCompactionParams(params, cfd->current(), cfd, &start_time, &end_time, pf.sf(t0, t3));
   if (!shutting_down.load(std::memory_order_acquire)) {
+    ROCKS_LOG_DEBUG(info_log, "Write compact.done");
     std::string compact_done_file = attempt_dir + "/compact.done";
     int fd = ::creat(compact_done_file.c_str(), 0644);
     if (fd < 0) {
@@ -1408,6 +1420,7 @@ auto writeObjResult = [&]{
     }
     //INFO("after close(compact.done)");
     if (!FEE_URL.empty()) {
+      ROCKS_LOG_DEBUG(info_log, "Report fee");
       DcompactFeeReport fee;
       fee.provider = CLOUD_PROVIDER;
       fee.dbId = params.db_id;
@@ -1429,6 +1442,7 @@ auto writeObjResult = [&]{
     }
   }
   if (terark::getEnvBool("DEL_WORKER_TEMP_DB", false)) {
+    ROCKS_LOG_DEBUG(info_log, "Deleting %s", attempt_dbname.c_str());
     std::error_code ec;
     std::filesystem::remove_all(attempt_dbname, ec);
     // if cur attempt is last attempt, DeleteDir will success
@@ -1443,6 +1457,8 @@ auto writeObjResult = [&]{
         attempt_dbname, params.output_level, pf.sf(t0,t1), pf.mf(t1,t2), pf.mf(t2,t3),
         SizeToString(inputBytes[0]), SizeToString(inputBytes[1]));
   }
+  ROCKS_LOG_DEBUG(info_log, "Compaction done");
+  info_log->Flush();
 
   return 0;
 }