diff --git a/be/src/common/config.cpp b/be/src/common/config.cpp
index e75ac2c1c755d4..d35a28f8b8c143 100644
--- a/be/src/common/config.cpp
+++ b/be/src/common/config.cpp
@@ -41,6 +41,7 @@
 #include "common/status.h"
 #include "io/fs/file_writer.h"
 #include "io/fs/local_file_system.h"
+#include "util/cpu_info.h"
 
 namespace doris {
 namespace config {
@@ -235,8 +236,14 @@ DEFINE_Bool(doris_enable_scanner_thread_pool_per_disk, "true");
 DEFINE_mInt64(doris_blocking_priority_queue_wait_timeout_ms, "500");
 // number of scanner thread pool size for olap table
 // and the min thread num of remote scanner thread pool
-DEFINE_Int32(doris_scanner_thread_pool_thread_num, "48");
-DEFINE_Int32(doris_max_remote_scanner_thread_pool_thread_num, "-1");
+DEFINE_Int32(doris_scanner_thread_pool_thread_num, "-1");
+DEFINE_Validator(doris_scanner_thread_pool_thread_num, [](const int config) -> bool {
+    if (config == -1) {
+        CpuInfo::init();
+        doris_scanner_thread_pool_thread_num = std::max(48, CpuInfo::num_cores() * 4);
+    }
+    return true;
+});
 // number of olap scanner thread pool queue size
 DEFINE_Int32(doris_scanner_thread_pool_queue_size, "102400");
 // default thrift client connect timeout(in seconds)
diff --git a/be/src/common/config.h b/be/src/common/config.h
index c911963a87fe17..90355ae3e56659 100644
--- a/be/src/common/config.h
+++ b/be/src/common/config.h
@@ -283,10 +283,7 @@ DECLARE_Bool(doris_enable_scanner_thread_pool_per_disk);
 DECLARE_mInt64(doris_blocking_priority_queue_wait_timeout_ms);
 // number of scanner thread pool size for olap table
 // and the min thread num of remote scanner thread pool
-DECLARE_Int32(doris_scanner_thread_pool_thread_num);
-// max number of remote scanner thread pool size
-// if equal to -1, value is std::max(512, CpuInfo::num_cores() * 10)
-DECLARE_Int32(doris_max_remote_scanner_thread_pool_thread_num);
+DECLARE_mInt32(doris_scanner_thread_pool_thread_num);
 // number of olap scanner thread pool queue size
 DECLARE_Int32(doris_scanner_thread_pool_queue_size);
 // default thrift client connect timeout(in seconds)
diff --git a/be/src/io/fs/buffered_reader.h b/be/src/io/fs/buffered_reader.h
index e78c1c79251146..7861e0ff023986 100644
--- a/be/src/io/fs/buffered_reader.h
+++ b/be/src/io/fs/buffered_reader.h
@@ -131,8 +131,8 @@ class MergeRangeFileReader : public io::FileReader {
     static constexpr size_t READ_SLICE_SIZE = 8 * 1024 * 1024;      // 8MB
     static constexpr size_t BOX_SIZE = 1 * 1024 * 1024;             // 1MB
     static constexpr size_t SMALL_IO = 2 * 1024 * 1024;             // 2MB
-    static constexpr size_t HDFS_MIN_IO_SIZE = 4 * 1024;            // 4KB
-    static constexpr size_t OSS_MIN_IO_SIZE = 512 * 1024;           // 512KB
+    static constexpr size_t HDFS_MIN_IO_SIZE = 8 * 1024;            // 8KB
+    static constexpr size_t OSS_MIN_IO_SIZE = 1 * 1024 * 1024;      // 1MB
     static constexpr size_t NUM_BOX = TOTAL_BUFFER_SIZE / BOX_SIZE; // 128
 
     MergeRangeFileReader(RuntimeProfile* profile, io::FileReaderSPtr reader,
diff --git a/be/src/vec/exec/scan/scanner_scheduler.cpp b/be/src/vec/exec/scan/scanner_scheduler.cpp
index 2e4db75a241b2c..3f7675ba0b8025 100644
--- a/be/src/vec/exec/scan/scanner_scheduler.cpp
+++ b/be/src/vec/exec/scan/scanner_scheduler.cpp
@@ -123,9 +123,7 @@ Status ScannerScheduler::init(ExecEnv* env) {
             config::doris_scanner_thread_pool_queue_size, "local_scan");
 
     // 3. remote scan thread pool
-    _remote_thread_pool_max_size = config::doris_max_remote_scanner_thread_pool_thread_num != -1
-                                           ? config::doris_max_remote_scanner_thread_pool_thread_num
-                                           : std::max(512, CpuInfo::num_cores() * 10);
+    _remote_thread_pool_max_size = config::doris_scanner_thread_pool_thread_num;
     _remote_scan_thread_pool = std::make_unique<PriorityThreadPool>(
             _remote_thread_pool_max_size, config::doris_remote_scanner_thread_pool_queue_size,
             "RemoteScanThreadPool");
diff --git a/fe/be-java-extensions/hudi-scanner/src/main/java/org/apache/doris/hudi/HudiJniScanner.java b/fe/be-java-extensions/hudi-scanner/src/main/java/org/apache/doris/hudi/HudiJniScanner.java
index daf8d4a21fa87b..17ca650675de3c 100644
--- a/fe/be-java-extensions/hudi-scanner/src/main/java/org/apache/doris/hudi/HudiJniScanner.java
+++ b/fe/be-java-extensions/hudi-scanner/src/main/java/org/apache/doris/hudi/HudiJniScanner.java
@@ -85,8 +85,8 @@ public class HudiJniScanner extends JniScanner {
     private static final ScheduledExecutorService cleanResolverService = Executors.newScheduledThreadPool(1);
 
     static {
-        int numThreads = Math.max(Runtime.getRuntime().availableProcessors() * 2 + 1, 4);
-        if (numThreads > 32) {
+        int numThreads = Math.max(Runtime.getRuntime().availableProcessors() * 2, 4);
+        if (numThreads > 48) {
             numThreads = Runtime.getRuntime().availableProcessors();
         }
         avroReadPool = Executors.newFixedThreadPool(numThreads,