diff --git a/be/src/vec/exec/scan/scanner_context.cpp b/be/src/vec/exec/scan/scanner_context.cpp
index 2a782d52bbab7b5..198637e5d32ee0e 100644
--- a/be/src/vec/exec/scan/scanner_context.cpp
+++ b/be/src/vec/exec/scan/scanner_context.cpp
@@ -172,8 +172,8 @@ Status ScannerContext::init() {
     _free_blocks_capacity = _max_thread_num * _block_per_scanner;
     auto block = get_free_block();
     _estimated_block_bytes = std::max(block->allocated_bytes(), (size_t)16);
-    int min_blocks = (_estimated_block_bytes + config::min_bytes_in_scanner_queue - 1) /
-                      config::min_bytes_in_scanner_queue;
+    int min_blocks = (config::min_bytes_in_scanner_queue + _estimated_block_bytes - 1) /
+                      _estimated_block_bytes;
     _free_blocks_capacity = std::max(_free_blocks_capacity, min_blocks);
     return_free_block(std::move(block));
 
diff --git a/be/src/vec/exec/scan/scanner_context.h b/be/src/vec/exec/scan/scanner_context.h
index ba9c1fdee10a5bd..bce5fc6c92957d4 100644
--- a/be/src/vec/exec/scan/scanner_context.h
+++ b/be/src/vec/exec/scan/scanner_context.h
@@ -146,6 +146,10 @@ class ScannerContext : public std::enable_shared_from_this<ScannerContext> {
 
     // todo(wb) rethinking how to calculate ```_max_bytes_in_queue``` when executing shared scan
     inline bool should_be_scheduled() const {
+        VLOG_NOTICE << "curl_bytes_in_queue " << _cur_bytes_in_queue << " max_bytes_in_queue "
+                    << _max_bytes_in_queue << " _serving_blocks_num " << _serving_blocks_num
+                    << " _free_blocks_capacity " << _free_blocks_capacity
+                    << " estimated_block_bytes " << _estimated_block_bytes;
         return (_cur_bytes_in_queue < _max_bytes_in_queue / 2) &&
                (_serving_blocks_num < allowed_blocks_num());
     }
diff --git a/be/src/vec/exec/scan/scanner_scheduler.cpp b/be/src/vec/exec/scan/scanner_scheduler.cpp
index e8d7f8a7139a6d3..334c25704b3dce6 100644
--- a/be/src/vec/exec/scan/scanner_scheduler.cpp
+++ b/be/src/vec/exec/scan/scanner_scheduler.cpp
@@ -314,8 +314,6 @@ void ScannerScheduler::_scanner_scan(ScannerScheduler* scheduler,
     // judge if we need to yield. So we record all raw data read in this round
     // scan, if this exceeds row number or bytes threshold, we yield this thread.
     std::vector<vectorized::BlockUPtr> blocks;
-    int64_t raw_rows_read = scanner->get_rows_read();
-    int64_t raw_rows_threshold = raw_rows_read + config::doris_scanner_row_num;
     int64_t raw_bytes_read = 0;
     int64_t raw_bytes_threshold = config::doris_scanner_row_bytes;
     int num_rows_in_block = 0;
@@ -329,11 +327,10 @@ void ScannerScheduler::_scanner_scan(ScannerScheduler* scheduler,
     // queue, it will affect query latency and query concurrency for example ssb 3.3.
     auto should_do_scan = [&, batch_size = state->batch_size(),
                            time = state->wait_full_block_schedule_times()]() {
-        if (raw_bytes_read < raw_bytes_threshold && raw_rows_read < raw_rows_threshold) {
+        if (raw_bytes_read < raw_bytes_threshold) {
             return true;
         } else if (num_rows_in_block < batch_size) {
-            return raw_bytes_read < raw_bytes_threshold * time &&
-                   raw_rows_read < raw_rows_threshold * time;
+            return raw_bytes_read < raw_bytes_threshold * time;
         }
         return false;
     };
@@ -380,7 +377,6 @@ void ScannerScheduler::_scanner_scan(ScannerScheduler* scheduler,
                 blocks.push_back(std::move(block));
             }
         }
-        raw_rows_read = scanner->get_rows_read();
     } // end for while
 
     // if we failed, check status.