diff --git a/db/db_impl.cc b/db/db_impl.cc
index 49fd3c9fb76177364e6882777c052172ed9b1ce3..fd336935349408334e72cf7eda32cc11af12cc75 100644
--- a/db/db_impl.cc
+++ b/db/db_impl.cc
@@ -276,6 +276,7 @@ DBImpl::DBImpl(const Options& options, const std::string& dbname)
       super_version_number_(0),
       local_sv_(new ThreadLocalPtr(&SuperVersionUnrefHandle)),
       tmp_batch_(),
+      bg_schedule_needed_(false),
       bg_compaction_scheduled_(0),
       bg_manual_only_(0),
       bg_flush_scheduled_(0),
@@ -1830,17 +1831,21 @@ Status DBImpl::TEST_WaitForCompact() {
 
 void DBImpl::MaybeScheduleFlushOrCompaction() {
   mutex_.AssertHeld();
+  bg_schedule_needed_ = false;
   if (bg_work_gate_closed_) {
     // gate closed for backgrond work
   } else if (shutting_down_.Acquire_Load()) {
     // DB is being deleted; no more background compactions
   } else {
     bool is_flush_pending = imm_.IsFlushPending();
-    if (is_flush_pending &&
-        (bg_flush_scheduled_ < options_.max_background_flushes)) {
-      // memtable flush needed
-      bg_flush_scheduled_++;
-      env_->Schedule(&DBImpl::BGWorkFlush, this, Env::Priority::HIGH);
+    if (is_flush_pending) {
+      if (bg_flush_scheduled_ < options_.max_background_flushes) {
+        // memtable flush needed
+        bg_flush_scheduled_++;
+        env_->Schedule(&DBImpl::BGWorkFlush, this, Env::Priority::HIGH);
+      } else {
+        bg_schedule_needed_ = true;
+      }
     }
 
     // Schedule BGWorkCompaction if there's a compaction pending (or a memtable
@@ -1850,11 +1855,13 @@ void DBImpl::MaybeScheduleFlushOrCompaction() {
     if ((manual_compaction_ ||
          versions_->current()->NeedsCompaction() ||
          (is_flush_pending && (options_.max_background_flushes <= 0))) &&
-        bg_compaction_scheduled_ < options_.max_background_compactions &&
         (!bg_manual_only_ || manual_compaction_)) {
-
-      bg_compaction_scheduled_++;
-      env_->Schedule(&DBImpl::BGWorkCompaction, this, Env::Priority::LOW);
+      if (bg_compaction_scheduled_ < options_.max_background_compactions) {
+        bg_compaction_scheduled_++;
+        env_->Schedule(&DBImpl::BGWorkCompaction, this, Env::Priority::LOW);
+      } else {
+        bg_schedule_needed_ = true;
+      }
     }
   }
 }
@@ -1912,15 +1919,26 @@ void DBImpl::BackgroundCallFlush() {
     // to delete all obsolete files and we force FindObsoleteFiles()
     FindObsoleteFiles(deletion_state, !s.ok());
     // delete unnecessary files if any, this is done outside the mutex
-    if (deletion_state.HaveSomethingToDelete()) {
+    if (deletion_state.HaveSomethingToDelete() || !log_buffer.IsEmpty()) {
       mutex_.Unlock();
+      // Have to flush the info logs before bg_flush_scheduled_--
+      // because if bg_flush_scheduled_ becomes 0 and the lock is
+      // released, the deconstructor of DB can kick in and destroy all the
+      // states of DB so info_log might not be available after that point.
+      // It also applies to access other states that DB owns.
       log_buffer.FlushBufferToLog();
-      PurgeObsoleteFiles(deletion_state);
+      if (deletion_state.HaveSomethingToDelete()) {
+        PurgeObsoleteFiles(deletion_state);
+      }
       mutex_.Lock();
     }
 
     bg_flush_scheduled_--;
-    if (madeProgress) {
+    // Any time the mutex is released After finding the work to do, another
+    // thread might execute MaybeScheduleFlushOrCompaction(). It is possible
+    // that there is a pending job but it is not scheduled because of the
+    // max thread limit.
+    if (madeProgress || bg_schedule_needed_) {
       MaybeScheduleFlushOrCompaction();
     }
     log_buffer.FlushBufferToLog();
@@ -1979,10 +1997,17 @@ void DBImpl::BackgroundCallCompaction() {
     FindObsoleteFiles(deletion_state, !s.ok());
 
     // delete unnecessary files if any, this is done outside the mutex
-    if (deletion_state.HaveSomethingToDelete()) {
+    if (deletion_state.HaveSomethingToDelete() || !log_buffer.IsEmpty()) {
       mutex_.Unlock();
+      // Have to flush the info logs before bg_compaction_scheduled_--
+      // because if bg_flush_scheduled_ becomes 0 and the lock is
+      // released, the deconstructor of DB can kick in and destroy all the
+      // states of DB so info_log might not be available after that point.
+      // It also applies to access other states that DB owns.
       log_buffer.FlushBufferToLog();
-      PurgeObsoleteFiles(deletion_state);
+      if (deletion_state.HaveSomethingToDelete()) {
+        PurgeObsoleteFiles(deletion_state);
+      }
       mutex_.Lock();
     }
 
@@ -1993,7 +2018,12 @@ void DBImpl::BackgroundCallCompaction() {
     // Previous compaction may have produced too many files in a level,
     // So reschedule another compaction if we made progress in the
     // last compaction.
-    if (madeProgress) {
+    //
+    // Also, any time the mutex is released After finding the work to do,
+    // another thread might execute MaybeScheduleFlushOrCompaction(). It is
+    // possible  that there is a pending job but it is not scheduled because of
+    // the max thread limit.
+    if (madeProgress || bg_schedule_needed_) {
       MaybeScheduleFlushOrCompaction();
     }
     log_buffer.FlushBufferToLog();
diff --git a/db/db_impl.h b/db/db_impl.h
index 96e3f1ea31e6c62aa00f3d2525271c9a4763cd79..e42848d11c7b67af6e2754fec60770bd05d5757f 100644
--- a/db/db_impl.h
+++ b/db/db_impl.h
@@ -454,6 +454,10 @@ class DBImpl : public DB {
   // part of ongoing compactions.
   std::set<uint64_t> pending_outputs_;
 
+  // At least one compaction or flush job is pending but not yet scheduled
+  // because of the max background thread limit.
+  bool bg_schedule_needed_;
+
   // count how many background compactions are running or have been scheduled
   int bg_compaction_scheduled_;
 
diff --git a/util/log_buffer.h b/util/log_buffer.h
index 76503a084a67e0521d114d6e849c294c93606943..8ebe92e0345bb134c4f200d40cf0334bd17c8f9f 100644
--- a/util/log_buffer.h
+++ b/util/log_buffer.h
@@ -23,6 +23,8 @@ class LogBuffer {
   // Add a log entry to the buffer.
   void AddLogToBuffer(const char* format, va_list ap);
 
+  size_t IsEmpty() const { return logs_.empty(); }
+
   // Flush all buffered log to the info log.
   void FlushBufferToLog();