diff --git a/storage/maria/ma_bitmap.c b/storage/maria/ma_bitmap.c
index 48a0545467c..613dcd18e02 100644
--- a/storage/maria/ma_bitmap.c
+++ b/storage/maria/ma_bitmap.c
@@ -3070,21 +3070,25 @@ my_bool _ma_check_if_right_bitmap_type(MARIA_HA *info,
 int _ma_bitmap_create_first(MARIA_SHARE *share)
 {
   uint block_size= share->bitmap.block_size;
+  size_t error;
   File file= share->bitmap.file.file;
-  uchar marker[CRC_SIZE];
+  uchar *temp_buff;
+
+  if (!(temp_buff= (uchar*) my_alloca(block_size)))
+    return 1;
+  bzero(temp_buff, block_size);
 
   /*
     Next write operation of the page will write correct CRC
     if it is needed
   */
-  int4store(marker, MARIA_NO_CRC_BITMAP_PAGE);
+  int4store(temp_buff + block_size - CRC_SIZE, MARIA_NO_CRC_BITMAP_PAGE);
 
-  if (mysql_file_chsize(file, block_size - sizeof(marker),
-                        0, MYF(MY_WME)) ||
-      my_pwrite(file, marker, sizeof(marker),
-                block_size - sizeof(marker),
-                MYF(MY_NABP | MY_WME)))
+  error= my_pwrite(file, temp_buff, block_size, 0, MYF(MY_NABP | MY_WME));
+  my_afree(temp_buff);
+  if (error)
     return 1;
+
   share->state.state.data_file_length= block_size;
   _ma_bitmap_delete_all(share);
   return 0;
diff --git a/storage/maria/ma_check.c b/storage/maria/ma_check.c
index 0c80b58d7e3..7f104325d00 100644
--- a/storage/maria/ma_check.c
+++ b/storage/maria/ma_check.c
@@ -418,6 +418,8 @@ int maria_chk_size(HA_CHECK *param, register MARIA_HA *info)
     /* We cannot check file sizes for S3 */
     DBUG_RETURN(0);
   }
+  /* We should never come here with internal temporary tables */
+  DBUG_ASSERT(!share->internal_table);
 
   if (!(param->testflag & T_SILENT))
     puts("- check file-size");
@@ -713,6 +715,8 @@ static int chk_index_down(HA_CHECK *param, MARIA_HA *info,
   MARIA_PAGE ma_page;
   DBUG_ENTER("chk_index_down");
 
+  DBUG_ASSERT(!share->internal_table);
+
   /* Key blocks must lay within the key file length entirely. */
   if (page + keyinfo->block_length > share->state.state.key_file_length)
   {
@@ -2464,7 +2468,16 @@ static int initialize_variables_for_repair(HA_CHECK *param,
     return 1;
 
   /* calculate max_records */
-  sort_info->filelength= my_seek(info->dfile.file, 0L, MY_SEEK_END, MYF(0));
+  if (!share->internal_table)
+  {
+    /* Get real file size */
+    sort_info->filelength= my_seek(info->dfile.file, 0L, MY_SEEK_END, MYF(0));
+  }
+  else
+  {
+    /* For internal temporary files we are using the logical file length */
+    sort_info->filelength= share->state.state.data_file_length;
+  }
 
   param->max_progress= sort_info->filelength;
   if ((param->testflag & T_CREATE_MISSING_KEYS) ||
@@ -2860,7 +2873,8 @@ int maria_repair(HA_CHECK *param, register MARIA_HA *info,
   {
     fputs("          \r",stdout); fflush(stdout);
   }
-  if (mysql_file_chsize(share->kfile.file,
+  if (!share->internal_table &&
+      mysql_file_chsize(share->kfile.file,
                         share->state.state.key_file_length, 0, MYF(0)))
   {
     _ma_check_print_warning(param,
@@ -4168,7 +4182,8 @@ int maria_repair_by_sort(HA_CHECK *param, register MARIA_HA *info,
   if (param->testflag & T_CALC_CHECKSUM)
     share->state.state.checksum=param->glob_crc;
 
-  if (mysql_file_chsize(share->kfile.file,
+  if (!share->internal_table &&
+      mysql_file_chsize(share->kfile.file,
                         share->state.state.key_file_length, 0, MYF(0)))
     _ma_check_print_warning(param,
 			   "Can't change size of indexfile, error: %d",
@@ -4706,7 +4721,8 @@ int maria_repair_parallel(HA_CHECK *param, register MARIA_HA *info,
   if (param->testflag & T_CALC_CHECKSUM)
     share->state.state.checksum=param->glob_crc;
 
-  if (mysql_file_chsize(share->kfile.file,
+  if (!share->internal_table &&
+      mysql_file_chsize(share->kfile.file,
                         share->state.state.key_file_length, 0, MYF(0)))
     _ma_check_print_warning(param,
 			   "Can't change size of indexfile, error: %d",
@@ -6108,6 +6124,8 @@ int maria_test_if_almost_full(MARIA_HA *info)
 {
   MARIA_SHARE *share= info->s;
 
+  DBUG_ASSERT(!share->internal_table);
+
   if (share->options & HA_OPTION_COMPRESS_RECORD)
     return 0;
   return mysql_file_seek(share->kfile.file, 0L, MY_SEEK_END,
diff --git a/storage/maria/ma_delete_all.c b/storage/maria/ma_delete_all.c
index c1019c01c66..d799e213d5f 100644
--- a/storage/maria/ma_delete_all.c
+++ b/storage/maria/ma_delete_all.c
@@ -103,9 +103,17 @@ int maria_delete_all_rows(MARIA_HA *info)
 #endif
 
   if (_ma_flush_table_files(info, MARIA_FLUSH_DATA|MARIA_FLUSH_INDEX,
-                            FLUSH_IGNORE_CHANGED, FLUSH_IGNORE_CHANGED) ||
-      mysql_file_chsize(info->dfile.file, 0, 0, MYF(MY_WME)) ||
-      mysql_file_chsize(share->kfile.file, share->base.keystart, 0, MYF(MY_WME)))
+                            FLUSH_IGNORE_CHANGED, FLUSH_IGNORE_CHANGED))
+    goto err;
+  /*
+    Avoid truncate of internal temporary tables as this can have a big
+    performance overhead when called by mysql_handle_single_derived()
+    tables in MariaDB as part of split materialization.
+  */
+  if (!share->internal_table &&
+      (mysql_file_chsize(info->dfile.file, 0, 0, MYF(MY_WME)) ||
+       mysql_file_chsize(share->kfile.file, share->base.keystart, 0,
+                         MYF(MY_WME))))
     goto err;
 
   if (_ma_initialize_data_file(share, info->dfile.file))