MAGETWO-64182: [Indexer optimizations] Batch data processing for price indexer

Author: Stanislav Idolov

lib/internal/Magento/Framework/Indexer/BatchSizeManagement.php

@@ -51,8 +51,9 @@ public function ensureBatchSize(\Magento\Framework\DB\Adapter\AdapterInterface $
         // Log warning if allocated memory for temp table greater than 20% of innodb_buffer_pool_size
         if ($size > $bufferPoolSize * .2) {
             $this->logger->warning(new \Magento\Framework\Phrase(
-                'Memory size allocated for temporary table is more than 20% innodb_buffer_pool_size. ' .
-                'Please update innodb_buffer_pool_size or decrease batch size value.'
+                'Memory size allocated for the temporary table is more than 20% of innodb_buffer_pool_size. ' .
+                'Please update innodb_buffer_pool_size or decrease batch size value '.
+                '(which decreases memory usages for the temporary table).'
             ));
         }