Bug #28653 Fast GCP + high load + high RedoBuffer causes ndbrequire

- correction, use recomputed _actual_ redobuffer

storage/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp

@@ -992,11 +992,6 @@ void Dblqh::execREAD_CONFIG_REQ(Signal* signal)
   ndb_mgm_get_int_parameter(p, CFG_DB_REDO_BUFFER,  
 			    &log_page_size);
 
-  /* maximum number of log file operations */
-  clfoFileSize = (log_page_size+32768-1)/32768;
-  if (clfoFileSize < ZLFO_MIN_FILE_SIZE)
-    clfoFileSize = ZLFO_MIN_FILE_SIZE;
-
   /**
    * Always set page size in half MBytes
    */
@@ -1007,6 +1002,11 @@ void Dblqh::execREAD_CONFIG_REQ(Signal* signal)
     clogPageFileSize+= (16 - mega_byte_part);
   }
 
+  /* maximum number of log file operations */
+  clfoFileSize = clogPageFileSize;
+  if (clfoFileSize < ZLFO_MIN_FILE_SIZE)
+    clfoFileSize = ZLFO_MIN_FILE_SIZE;
+
   ndbrequire(!ndb_mgm_get_int_parameter(p, CFG_LQH_TABLE, &ctabrecFileSize));
   ndbrequire(!ndb_mgm_get_int_parameter(p, CFG_LQH_TC_CONNECT, 
 					&ctcConnectrecFileSize));